Always, always, always - Before you turn in any kind of writing or before sending a letter or email, you should proofread what you wrote. You can have someone else read through your final draft - they may catch errors that you don't notice because you are the one who wrote it.
Below are several things to pay attention to while you are writing and then to check again when you have finished writing.
ALWAYS PROOFREAD!!
Use a basic font like Arial or Times New Roman. Size should be 11 or 12 pt.
Do not use bold or italics in your paper. The only exception is when you put the title of a long work in italics (see more below).
Lines should be double spaced. (In Google Docs: Format, Line & paragraph spacing)
Margins should be 1 inch at top, bottom, left, and right unless your teacher specifies otherwise. (File, page setup)
Use "tab" to space the first line of your paragraph over. Do not just hit space bar several times.
Only one space after period and other sentence-ending punctuation
If a paper is longer than one page it should have page numbers (Insert, page numbers)
Make sure that your subject and verb agree. Are they both singular? Are they both plural? Do not mix and match!
Sometimes the subject of your sentence is not the one you think it is! For example, look at the difference between these two sentences:
"The students in the class were very excited about the trip." vs "The classroom of students was very excited about the trip."
In the first sentence, "students" is the subject so the verb is plural. In the second sentence, the subject is "classroom" so the verb is singular.
Be consistent in your use of past or present tense.
For example: Shakespeare likes to use alliteration in his plays. An example of alliteration that he used in Macbeth is "Fair is foul, and foul is fair."
The first sentence is in present tense and the second is in past tense. We use present tense when talking about literature, so we should say that he uses the alliteration.
Avoid using slang or informal language like contractions, unless you are trying to make a point or you are quoting something.
In general, make sure that your wording is clear and concise and that your meaning can be understood by others.
Apostrophes:
Use them to indicate possession: That was Mary's book. But not with pronouns: That was hers.
Remember that it's is not the same as its. It's = it is. Its = something belongs to it.
When using the possessive with a plural noun that ends in s, use the apostrophe without an additional s: the students' schedules, the dogs' bowls, the Smiths' family reunion. If it is a singular proper noun that ends in s, DO add the s: Charles's book.
When referring to a decade, do not use an apostrophe: It happened in the 1960s. The exception is if it is indicating something that belongs to that decade: That was a 1930's style dress.
Quotation marks: Use them to enclose exact words taken from a text. If it is at the end of the sentence, put the punctuation (a period, question mark, or exclamation point) inside the quotation mark (exception is when you have a citation after the period). More on including quotations in your writing is under Textual Evidence.
Commas: Commas are very useful but can often be overused or used in the wrong places.
Use commas to separate items in lists of three or more. The comma that comes after the second-to-last item (before the "and" or "or") is called the Oxford, or serial, comma. There is disagreement on whether it should be used, but is useful for clarity. Be consistent on using or not using it throughout your paper.
Use a comma to connect two independent clauses with a coordinating conjunction (FANBOYS: For, And, Nor, But, Or, Yet, So).
Use commas to set off a word or phrase that is not essential to the meaning of the sentence: I told my friend, who was next to me, that we needed to go. If the word or phrase is essential to the meaning, do not use commas.
Use a comma before or after a quote if the words are telling us who said the words: He said, "Please don't wait for me."
Capitalization: Make sure you capitalize the words that should be in upper case, and only the ones that should be!
Proper nouns (specific names of people, places, or things) are always capitalized, no matter where they are in a sentence.
A family relationship or a title is capitalized when used as a proper noun or as someone's name, but not on its own.
Examples: She is my aunt. My Aunt Eloise came to visit.
Barack Obama was the president of the United States. I met President Carter when I visited Georgia.
Note the difference between these two: I told Mother that I didn't want any supper. Please tell my mother that I won't be at supper.
The first word of any sentence should be capitalized.
The pronoun "I" is always capitalized.
In a title, most words are capitalized. Articles, conjunctions, and prepositions are generally not capitalized unless they are the first word of the title.
Spelling: Use the spell check, but also be aware that it will not catch words that are spelled correctly but used in the wrong way. If you are using Grammarly, it may spot these errors. Always proofread your work and make sure the words that are there are the ones that should be!
If you mean "They are" you do not want to say "Their," the correct way to spell the contraction is "They're." It is better to spell out the words. It is the same for "You are" - "You're" is correct, "Your" is not.
When you are comparing two things, the word to use is "than:" He is taller than I am. If you are talking about a sequence of events, the word to use is "then:" I went to the store and then I went home.
When giving the name of a work (book, play, poem, text, song, painting) in your paper, it should be set out with either italics or quotation marks. Which gets which?
Longer works or works that contain smaller sections - a book, an album, a full-length play - should be in italics.
Shorter works - book chapters, a poem, a song, a one-act play, a short story, newspaper or journal articles - should be in quotation marks.
Examples:
Mary Oliver's Why I Wake Up Early: New Poems is a collection of poems that was published in 2004. My favorite poem in the book is "Snow Geese."
My favorite Taylor Swift song is "I Knew You Were Trouble" from her album Red.
When I read The Absolutely True Diary of a Part-Time Indian, I laughed out loud. But the chapter "Red Versus White" is quite sad.
If you need more help, you may want to check out these sections on the Purdue OWL website: