ESL Grammar Index of Online Resources

Free Internet Grammar Exercises (Organized by Grammar Topic)--  The following links are alphabetically organized, and, after each grammar topic, the sites range from basic to advanced. All of these links should be free and not require signing in or registering.Student and faculty comments are in red and in parenthesis.



 Adjective

Beginning Levels 1-3:
a4esl
- Comparative & Superlative Possessive Adjectives Comparison 


Intermediate Levels 4-6:

Using English - ed vs. -ing (The quiz is easy!)
ESL Blues  Bored vs. Boring, I'm Exhausted I'm Still Exhausted Frustrat-ING/-ED Trivia quiz on superlatives and Comparing: The Best, Most Honest, Etc. (Here are so many practices.  The more you practice, the more you could remember.)
a4esl -Adjective Order Natural Order of Adjectives  Comparative & Superlative 3
Learn 4 Good - Adjective word orderThis is very useful, It's good for your writing.)
(Good introduction for adjective word order. I think we should know in lower level.)
Grammar-Quizzes.com - Adjectives summary and quizzes (Useful! I like it. It is helpful to level 8 students.)

Adjective clauses

Advanced Levels 7-9:
Grammar-Quizzes.com - Adjective clauses summary and quizzes (Very helpful, detailed explanation for all kinds of adjective clauses.)
esl.about.com - Subordination with Adjective Clauses

Adverbs

Beginning Levels 1-3:
Morris Bibliowicz's Webpage - Adjectives and Adverbs (Read the short note at the beginning , it explains the difference between adj and adv clearly. Use a sheet of paper then it will be easier to check yours answers)

a4esl.com -  Adjective or Adverb? Word Choice  Adjective or Adverb  Adjective or Adverb 2   Adjective or Adverb  Adverbs or Adjectives
Grammar Bank - Adjectives Adverbs Exercises

Intermediate Levels 4-6:
English Page so vs. such 
English ESL Store.net so vs. such (It's easy!)

Advanced Levels 7-9:
Grammar-Quizzes.com   adverbs summary and quizzes    (Good website! List many adverbs form for usual adjective.)

Adverb Clauses

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Intermediate Levels 4-6:

Morris Bibliowicz's

Past Tense Time Clauses

Learn 4 Good

Adverb Clauses

esl.about.com

adverb clauses

5 Minute English Lessons

Using because to connect sentences

a4esl.com

adverb clauses: Cause and effect relationships


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Intermediate Levels 4-6:
Morris Bibliowicz's - Past Tense Time Clauses
Learn 4 Good - Adverb Clauses

esl.about.com adverb clauses
5 Minute English Lessons - Using because to connect sentences
a4esl.com adverb clauses: Cause and effect relationships

Adverb Clauses Reduced 

Intermediate Levels 4-6:

a4esl

Reduced Adverb Clauses Active and Passive Meanings


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Intermediate Levels 4-6:
a4esl Reduced Adverb Clauses Active and Passive Meanings

Articles

Beginning Levels 1-3:
Grammar Bank - A an the Worksheets


Advanced Levels 7-9:


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as..as, such as, so that, such that


Intermediate Levels 4-6:

to Be


Beginning Levels 1-3:
ESL Partyland Jobs: Simple Present
John Robinson's Blog  Verb "be" in Present Tense: Choose
   Verb "be" in Present Tense: Fill Blanks   There's, There are
Morris Bibliowicz's webpage- The Verb To Be
a4esl - Am, Are or Is 
The Verb "To Be" Was-Were  Was or Were
ESL Blues -
:I'm booking A Flight. There is/are.   In My Apartment There's a ...

Intermediate Levels 4-6:
a4esl - To Be" or "To Do" in Questions  BE Verb - Present and Past  To Be: Past and Present
ESL Blues - Questions animated explanation with links to more.
 How Old Are You?  Renting an Apartment   Stuck in Traffic: Present tense forms. Telephone Job Interview: Asking questions.
(like this link! Good practice conversation)

Borrow or Lend

Intermediate Levels 4-6:
a4esl - Borrow or Lend    (Too easy to get the answers)

Causative


Intermediate Levels 4-6:

Grammar Bank - Causative Exercise 1, Causative Exercise 2 (Good for practicing)
EnglishvocabularyCausative Exercise

Conditionals (if, wish, etc.)

Intermediate Levels 4-6:
English Club - Conditionals Quiz
English Grammar 4U - Conditional 1 SimpleConditional 1
English Hilfen - Conditional II Exercises 1Conditional II Exercises 2 (Good exercises)
English Page - The Conditional (Lots of exercises here)

Advanced Levels 7-9:
a4esl - If Clauses If or Unless
English Grammar 4U - Continuous, Conditional II Simple, Conditional II Continuous,
                                                               Subjunctive, If Clauses
Grammar-Quizzes - Conditionals Summary and Quizzes (It is excellent!)

Conjunctions

Intermediate Levels 4-6:
a4esl - Conjunctions - Level 1
Proprofs - Conjunctions - Level 2 (It's easy)  
Grammar Bank - Conjunctions Exercises

Advanced Levels 7-9:
a4esl - Connectives (Not too difficult) And So ...

Either, Neither, too

Advanced Levels 7-9:
5 Minute English - Either, Neither, and Too (It's useful)
UsingEnglish.com - Both, Either, Neither (It's confusing but helpful)

For or Since

Intermediate Levels 4-6:
5 Minute English - Using Since and For (It's nice)
a4esl - For or Since  For or Since  For or Since  For-Since  Until-Since-For (Many exercises)
English ClubFor or Since Quiz (Great!)

Future Tense

Beginning Levels 1-3:
John Robinson's Blog - "She's going to work later."  "She'll work later."

Intermediate Levels 4-6:
Grammar Bank -   Future Tense Exercise: Will vs Going To
   Will or Be Going To Worksheet (Good exercises, but avoid the ads)
English Club -
 
Future Time Quiz (It's helpful)
a4esl - Going To  "Will Be Doing" or "Will Have Done"  (Number 5 is wrong)
English Grammar 4U Future Simple I (will), Future Simple I (be going to) (explanations and tests)

Future Perfect Tense

Advanced Levels 7-9:
a4esl -   "Will Be Doing" or "Will Have Done"
Grammar Bank - 
Future Perfect and Perfect Progressive Exercise

Gerunds & Infinitives


Beginning Levels 1-3:
John Robinson's Blog  Infinitive and Simple Past  Using the Base Form or the Infinitive

Intermediate Levels 4-6:

English Club quiz on Gerunds (The quiz is too easy! There is a problem with sentence 9) and Infinitives (The quiz is very easy too!)
Grammar Bank -
Gerund vs Infinitive Exercises

Advanced Levels 7-9:
a4esl - Gerund or Infinitive Misuse of the Infinitives Verb Form Quiz - Gerund or Infinitive
eslgold List of Verbs that Take Gerunds(It explains very clearly.) and List of verbs that Take Infinitives (this is very helpful)
ESL Blues - Do it   I Like Doing / to Do It    I Like Doing it 2  
English Club - Infinitive or -ing Quiz Gerunds Quiz
English Page.com Explanation and many exercises (Many exercises about Infinitive and Gerunds. Greatful!)
ESL US Gerunds and Infinitives Quiz (This quiz is level 9)
esl.about.com Gerund or Infinitive Quiz 1 and Quiz 2 (Each quiz is 30 questions, and we get a feedback at the end. Level 8-9)
usingenglish.com Definition and Intermediate and advanced exercises ( I find this site really useful)
Grammar Quizzes Gerunds Summary and Infinitives Summary


Idioms 

Idiom Connection - http://www.idiomconnection.com/  (Very nice, useful and interesting website, I highly recommend it: it seems difficult when you read the idiom and becomes easy when you read the meaning).   

Irregular Verbs

Intermediate Levels 4-6:
    A-B    C-E     F-G   H-M   P-S   SH-SP   SW  
Irregular verbs similar in the present and past tense: (This website allows students to point to the similarities so that they find the ease to learn the rest of irregular verbs that are different)
  My Beard    A Disastrous Day   Jeopardy Quiz  The Hockey Game - A Little Accident  (so funny and useful games!)
 

Advanced Levels 7-9:
English Page Irregular Verb Dictionary
- If Clauses see also Conditional

Intermediate Levels 4-6:
a4esl - If Clauses
Grammar Bank -  If Clauses Exercise
Independent/Dependent Clauses (We need more exercises)

Advanced Levels 7-9:
OWL - Independent/Dependent Clauses 
Commnet Identifying Independent Clauses
Tongue Untied - Identifying various clauses and phrases
Virginia Tech - Identifying clauses and phrases 

Make or Do 

Intermediate Levels 4-6:
a4esl - Do or Make  Did or Made  Make or Do

Modal Auxiliary Verbs

Intermediate Levels 4-6:
ESL Gold Basic Modals (Click for Audio) (Explanation only)
Grammar Bank -  Modal Verbs Exercises
ESL US Modals
a4esl - ability  Modals  Telephone English
English Club Have to, Must Quiz  Can, Could Quiz
English Page - Can, Could, Have to, Must, Might and Should Exercise (Can check correct answers)
5 Minute English Lessons - Using have to, supposed to, and ought to

Advanced Levels 7-9:
Grammar Quizzes - Summary and many quizzes
English Page Modals  (It is hard)

Nouns: "Count Noun and Non-Count Noun"

Beginning Levels 1-3:
a4esl - How Many?-How Much?(It's easy.)
JohnRobinson's Blog - Partitives and Non Count Nouns (It show the answer at the end)
Learn English Feel Good-
Level Advance. (
indicate whether the noun before that space is a count or noncount noun)

Intermediate Levels 4-6:

ESL Blues - Count and non-count nouns:  Quiz 2 How much/ how many Night Skiing (It is too easy for level 8 students!)(It's easy to get the answer, you can get 100%)
a4esl - Assorted Count and Noncount Nouns  Countable or Non-Countable Nouns  Countable and Noncountable Nouns  A Little-A Few
Universiy of Victoria- Count and Non-count Noun 1 (It's easy but useful)

Advanced Levels 7-9:
ESL Blues - Count and non-count nouns: Quiz 3  Quiz 4 (Difficult!) such/such a  Such a hard quiz! 
Georgia State University - count and non-count noun summary
eflnet - count/noncount

myenglishpage- Countable and Uncountable Nouns (It has lots of pages that talk about the techniqies in learning English at the left side)

Noun Singulars, Plurals, Determiners,Quantifiers.

Beginning Levels 1-3:
ESL Blues - Noun plurals-Singular and Plurals Noun. 
Grammar Exercise: Some-/any-/no-body, etc (Exercise with the time setting)
Morris Bibliowicz's webpage - Singular to Plural, and Irregular Plural Nouns.
2ndgradeworksheet- Singular and Plural Nouns Worksheet (You can download those worksheets for praticing)

grammarbank- Determiners and Quantifiers Tests (Little bit confusing)

Advanced Levels 7-9:
a4esl's -Plurals   Singular, Plural or Possesive Some or Any  
ESL Instructor.net - determiners
grammarbank- Determiners Articles Quiz (It's helpful)

Noun Clauses

Advanced Levels 7-9:
Grammar-Quizzes.com - Noun Clauses.

Parallel Verbs

Participles

Intermediate Levels 4-6:
a4eslParticiples - ing vs. ed 

Advanced Levels 7-9:
a4esl - Participles - Proposition 215

Parts of Speech

Advanced Levels 7-9:
a4esl - Word Groups - Parts of Speech Identify the Parts of Speech 
English Club Parts of Speech Quiz (Easy Quiz! but helpful)
ESL.com's Parts of Speech

Passive & Active Verbs

Intermediate Levels 4-6:
English Club Active or Passive Quiz (Good exercise)
Morris Bibliowicz's webpage - Passive Voice and More Passive Voice
a4eslActive or Passive Voice 
esl US - Active to Passive 1 and 2 (Exercise, It's useful!)

Advanced Levels 7-9:
English Zone of Passive and Active Verbs(Detailed summary, no exercise.)
ESL Blues - Passive verb forms in the past -  Grammar and Trivia Quiz    Active/passive verbs  Space/Exploration  (difficult)
a4esl -  Active and Passive (It's good to learn every tense of active and passive, but don't click on the ads!)
esl.about.com Passive to Active and Active to Passive

Grammar Quizzes Passive Summary (Note the many links to participles and participial phrases)

Past Continuous (Progressive) Tense


Intermediate Levels 4-6:

Morris Bibliowicz's - Past Continuous, More Past Continuous, and Past Tense and Past Continuous
Grammar Bank - Simple Tenses / Past Continuous With Vocabulary (Good exercises, but avoid the ads)

Past Perfect Tense

Intermediate Levels 4-6:
ESL Blues - What a night! Past perfect (had seen, etc.)
(with exercises)
English Grammar 4U - Past Perfect Simple
(explanation on that page and there has many links to work on exercises.)
Grammar Bank Simple Past vs Past Perfect Tenses Exercise
(It is good exercise and you can write your own story based on this exercise)
Perfect English Grammar Simple Past vs Past Participle Exercise Present Perfect or Past Perfect Tenses Exercise - Intermediate
English Page - Past Perfect (good website with usage and explanation with examples)

Past Perfect Continuous(Progressive)

Intermediate Levels 4-6:
English Grammar 4U
- Past Perfect Progressive (Continuous), Exercise page
(Please work on the exercise to get more understanding)

Phrasal Verbs

Intermediate Levels 4-6:
a4esl - Phrasal Verbs (Good one - i like it)  Look At - Look For - Look After  (it is easy exercise)
English ClubPhrasal Verbs Quiz (It is interesting and helpful  but need more explanation) 
ESL US.com - Phrasal Verbs (Useful, but not enough)
5 Minute English  -
Phrasal Verbs using Do  Phrasal Verbs with Go Phrasal Verbs with Come Phrasal Verbs with Get Phrasal Verbs Using Take
Grammar Bank -
list of phrasal verbs and exercises listed at the bottom.

Advanced Levels 7-9:
English Page - Phrasal Verbs with Prepositions (It is helpful to guess the words meaning)
Phrasal Verb Dictionary (Great! Many useful verbs.)

Prepositions

Beginning Levels 1-3:
a4esl - Prepositions: At, In and On Prepositions Prepositions: At, In & On In, At or On Prepositions Prepositions 1 Prepositions 2 Prepositions: Before or After Prepositions Prepositions I Prepositions II Prepositions III Prepositions - Level 1 In-At with Places  In-On-At At-On-In Used in Time and Dates  At-By-With  Prepositions   Choose the Correct Preposition (These are all similar, but useful!)
Morris Bibiowicz's webpage - Prepositions and More Prepositions and Practice Prepositions
John Robinson's Blog - Preposition Practice

Intermediate Levels 4-6:
ESL Blues -  At   In   On  Student Loan Blues 
5 Minute English  - Using Since and For, In, On, At + Time or Date

a4esl
-
Prepositions - Type in the Answer After, For or Since Prepositions Correct or Incorrect - Prepositions  Prepositions Pick a Particle: In, On or Up Prepositions  Prepositions - Level 2 Prepositions - Level 3   Astronomy (Preposition Quiz) On-In-At 

Advanced Levels 7-9:
a4esl  The Manatee (A Quiz on Prepositions) Particles in Conversation Questions - 1   - 2   - 3  - 4  - 5  - 6   - 7  USA Celebrations & Holidays  (confusing, but it's helpful)
esl.about.com Prepositions Quizzes #1, #2, #3, #4, #5, #6, #7
ESL Gold - Verb and Preposition Collocations
English Page prepositions

Present Tenses

See Simple Present, Present Continuous (Progressive), Present Perfect, and Present Perfect Continuous

Advanced Levels 7-9:
Grammar Quizzes Present Tense Summary (a great website, good exercises)

Present Continuous (Progressive) Tense

Beginning Levels 1-3:
Grammar Bank -  Simple Present vs Present Progressive Tense Quiz - Elementary
English Grammar 4U - Present Progressive
John Robinson's Blog . Present Progressive Tense   Present Progressive Practice  Verb plus "ing" Spelling Practice  Present Progressive or Simple Present?  Present Progressive or Simple Present: Quiz   Present Tenses: Simple and Continuous   Information Questions 
( A lot of reading and exercises)

Intermediate Levels 4-6:

ESL Blues -   Hurricane on the Way,  I'm Going to a Party  
5 Minute English - Simple Present vs Present Continuous 
English Club - Continuous Tense Quiz  Present Continuous Quiz
Esl.about.com
- Simple vs Continuous Tenses (Have to be patient, a lot of reading and exercises)

Present Perfect Tense

Intermediate Levels 4-6:
Morris Bibliowicz's Webpage Present Perfect and Present Perfect Negative
English Grammar 4U - Present Perfect Simple (Clear definition)
5 Minute English - Have you ever...?, Past Participles
ESL Blues - Dancing Duo:  (Useful exercise)
a4esl - Present Perfect or Past Tense Present Perfect vs. Past Simple
English Club - Present Perfect,
Grammar Bank Simple Past or Present Perfect Exercise
   Simple Past vs Present Perfect Tense Exercise 2
    Present Perfect Already / Just / Yet + Gone vs Been Exercises  Present Perfect vs Present Perfect Progressive Worksheet - Intermediate  Present Perfect or Past Perfect Tenses Exercise - Intermediate

Intermediate Levels 4-6:
 Grammar Quizzes - Present Perfect Summary and Quizzes (Different levels of games)

Present Perfect Continuous (Progressive) Tense

Intermediate Levels 4-6:
5 Minute English Lessons - The Present Perfect Progressive Tense
English Club - Present Perfect Continuous
Grammar Bank -   Simple Perfect vs Perfect Continuous (Progressive) Tenses Worksheet 
 Future Perfect and Perfect Progressive Exercise (Good definition and 
exercises)

Pronouns

Beginning Levels 1-3:
Using English - Subject/Object pronouns (good site, very convenient but too easy)                                                                                                                                        

a4esl -Pronouns (Subject or Object)  Subjective and Objective Possessive Pronouns Possessive Adjectives                                                                                                            

John Robinson's Blog - Subject Pronouns.  We are working.  Object Pronouns.  She's giving him a present.  Possessive Adjectives.  He likes his new jacket.  Possessive Pronouns.  Reflexive Pronouns.  I can fix it myself.  Is that book mine or yours? 


Intermediate Levels 4-6:
                                                                                                    
 Using English
- Pronouns (good site, very convenient level 6-8)  Possessive/Reflexive (good site, very convenient level 6-8) They / Them /Their/Theirs                                     
ESL Blues
 The Camping Trip  Myself, yourself, each other, etc                              
 a4esl
- Type in the Correct Pronoun Pronouns   Pronouns       Object Pronouns  Pronouns  Pronouns   Reflexive Pronouns
     
5 Minute English Lessons - Reflexive Pronouns , Its vs It's

Question Forms ("Wh" Questions, Information questions)


Beginning Levels 1-3:
NEW ESL Blues Present Tense Questions (explained in animation)  Question Words  Flash drag-and-drop quiz
Morris Bibliowicz's webpage - Present Tense Questions and Wh Questions
Using English - Question Words
a4esl - Question Words Question Words   Question Words
Question Words   Wh-Questions
   Questions & Answers - Matching Quiz  Question Formation
John Robinson's Blog - Information Questions  "Where does she work?"  "How does she get to work?"

Intermediate Levels 4-6:
NEW ESL Blues-Trivia and Grammer Quiz Questions  Quiz Question words Murder or Suicide:  Questions
a4esl - Question Formation II How & Complement - Matching Quiz What-When-Where What-Which-How Indirect Questions
ESL Blues -Asking Question Flash quiz
English Club Questions Quiz
Hilfen.de questions I & II

Reported Speech

Advanced Levels 7-9:
EnglishGrammar 4U Reported Speech (The quiz is too easy!)
5 Minute English Lessons - Reported Speech Part 1, Part 2
a4esl -
Reported Speech  Reported Speech Reported Speech at a Much Later Time
esl.about.com's reported speech (Too many ads. Exercises require a partner)

Relative Clauses

Intermediate Levels 4-6:
Using English - Relative Pronouns I & II   Which and Where

Advanced Levels 7-9:
Using English -Omitting Relative Pronouns
Georgia State University instructor's Recorded lesson on Relative Clauses
Grammar Quizzes Relative and other Modifying Clauses  (very complete)

Say vs. Tell

Intermediate Levels 4-6:
a4esl - Tell or Say (ok practice, but just so so)
Using say or tell How to use them(very easy to understand.  Watch out for the many stupid ads)
Cambridge dictionary Grammar

Sentence Combining

Intermediate Levels 4-6:
5 Minute English Lessons - Using because to connect sentences (very good)
a4esl - Sentence Combining Choose the Best Connector 
eslus.com's sentence combining I sentence combining II  (Good, but the words are difficult to see)

Advanced Levels 7-9:
chompchomp.com's Comma Splices & Fused Sentences (Very funny prizes) Fragments
Capital Community College Foundation Sentence Combining Quiz 1. 2. 3. (These quizzes are good)

Grammar-Quizzes.com so that/such that (These quizzes are complete and there have exercises)

Sentence Parts

Advanced Levels 7-9:

Simple Past Tense

Beginning Levels 1-3:
ESL Blues - explanation in animation |Be-Questions
a4esl - Simple Past Review (very interested exercise)  Simple Past or Past Continuous - A Dialog
Education First Definition of the simple past tense(very complete)
Morris Bibliowicz's - Past Tense, Past Tense 2, More Past Tense, and Irregular Past
English Grammar for you- Simple Past
 John Robinson's Blog    Simple Past Tense "She worked yesterday."  "How was your vacation?"  Past Tense of Irregular Verbs  Paragraph Cloze Exercise Plus Quiz  Infinitive and Simple Past 
Grammar Bank - Simple Past Tense Exercises - Beginners  (Good exercises, but avoid the ads)

Intermediate Levels 4-6:
Grammar Bank -   (Good exercises, but avoid the ads)
engvid .com  Past tense questions vide0 (very useful video classes)
esl.about.com - Past Tenses

Simple Present Tense


Beginning Levels 1-3:
John Robinson's Blog   Simple Present Tense: Typing  Simple Present Tense: Choose
"She works every day."- Fill the Blanks.  Present Negative Helping Verbs
Morris Bibliowicz's webpage - Present Tense and More Present Tense
ESL Blues -simple present and subject/verb agreement Trivia and Grammar Double Quiz Negative, use/non-use of s ending - Almost a double quiz  
a4esl.com Present Simple Negative Verbs  Present Simple Verbs Use the Correct Present Tense Verb
English Club Present Tense , Present Simple Quiz

Intermediate Levels 4-6:
Grammar Bank -    Simple Present vs Present Progressive With Vocabulary   Present Simple vs Present Continuous Exercise  (Good exercises, but avoid the ads)
ESL Blues -negatives   Bill Gates and I negative - Bill and I (again)   Simple present negative verbs-Make it true   Asking Questions? simple present vs. present continuous Hurricanes Happen:  Questions:  What do we do?  I'm Doing a Quiz:  Non-progressive verbs 

Advanced Levels 7-9:
Grammar Quizzes Present Tense Summary

Since vs. For

Grammar Bank -  Since vs For Exercises

Subject Verb Agreement


Beginning Levels 1-3:
a4esl -  Subject-Verb Agreement  Have-Has Subject and Verb Agreement  Subject Verb Agreement

Intermediate Levels 4-6:
a4esl -Obligation with Subject Agreement 
ESL Gold Subject Verb Agreement (Click for Audio...but it doesn't always work. It's more helpful if you can open it on a separate page) (Just and explanation, no exercises.)

Advanced Levels 7-9:
a4esl - Subject-Verb Agreement - Difficult  Subject/Verb Agreement - Vitamins

Subjunctive

Advanced Levels 7-9:
5 Minute English Lessons - Using Wish in the Past, Using Wish in the Present
English Club
Subjunctive Quiz (This is a little hard Quiz to understand with 3rd person)

Tag Questions


Intermediate Levels 4-6:

This/That/These/Those 

Beginning Levels 1-3:
ESL Gold This, That, These Those (Explanation only.  Click for Audio)

There is/are

Beginning Levels 1-3:
Agenda Web - There is/ There are 1 (In this page, will you find many exercises about There is /There are)
Agenda Web - There is/ There are 2 
(In this page, you have to choose your answers and they give your score)

Intermediate Levels 4-6:
English Exercises - There is/ There are 3 (In this page, there are four options to choose. When you finish, click “done” and check your answers)
Englisch-hifen - There is/ There are 4 (In this page, you have to write and then check your answers)

Their/There/They're

Beginning Levels 1-3:
Study Guides and Strategies - Their/ There/ They're 1 (In this page, they give a brief definition and 16 practice exercise)
University of Bristol - Their/ There/ They're 2 (Choose the answer and check if you was right)

Intermediate Levels 4-6: 
Better English Their/ There/ They're 3 (In this website, you have three options and you’ll know if you made the right answer)
Englisch-hifen - Their/ There/ They're 4 (In this page, you have to choose the right answer and when you finish click on “check” to know your result)

Used to

Intermediate Levels 4-6:
English Club - Used to 1 (Great website to check your answer)
Learn 4 Good.Used to 2 (this page give you definitions and multiply choose exercises)
5 Minute English Used to 3 (This website give definitions and then you have to choose the right answer and then you can check it)

Verb Form

Beginning Levels 1-3:
 John Robinson's Blog - Negative Statements.  "Bob didn't find his wallet."

a4esl - Choose the Correct Verb Form Choose the Correct Verb Form Choose the Correct Verb Form Choose the Correct Verb Form Choose the Correct Verb Form Choose the Correct Verb Form and Spelling  Verb Form Review  What's the Correct Verb Form?  What's the Correct Verb Form?

Intermediate Levels 4-6:
a4esl - Verb Forms   What's the Correct Verb Form #1  #2  #3 Tons of Snow (Quiz on Verb Forms)  How to See America - A Verb-Form Exercise  John's Life - A Verb-Form Exercise  Olympics (Verb Form Quiz 1)  Olympics (Verb Form Quiz 2  Verb Forms  Verb Forms  An Accident (A Verb-Form Exercise)

Advanced Levels 7-9:
a4esl -Things People Do (Choose the Correct Verb Form)
ESL Blues -
Verb Forms - Grammar and Trivia Quiz

Verb Tenses

Intermediate Levels 4-6:
Grammarbank  Summary and Charts of Tenses and  Mixed Verb Tenses Exercises

Very vs. Too

Intermediate Levels 4-6:

Speakspeak  ( click the inside link to practice.  Many kinds of  grammar. It is useful. )

5 Minute English Lessons - Very vs. Too Very Vs Too 2( This video is easy to understand. )The difference between too & very( Read&Think,it is the good way to help you to remember. )

Yes/No Questions


Beginning Levels 1-3:
Morris Bibliowicz's website - Short Answers ( Good practice.)English Grammar Games 
John Robinson's Blog -
Yes/No Questions   ( It is simple and clear. )

ESL Gold - Yes/No Questions  ( It's more helpful if you can open it on a separate page) 
English Grammar 4U Short Answers Yes/No Questions #1: BE Yes / No Question #2: Verbs with Auxiliaries Yes / No Questions #3: Verbs with No Auxiliaries (It 
is very useful.