When working on writing, be sure to keep the same tense throughout.

For example, if you start re-telling the plot of a story in the present tense, don’t switch to the past tense:

✗Jean Val Jean began (past tense) his life in poverty. He then steals (present tense) a loaf of bread to feed his family. As a result of this, he went (past tense) to prison.

✓Jean Val Jean begins his life in poverty. He then steals a loaf of bread to feed his family. As a result of this, he goes to prison. (all present tense)

Or

✓ Val Jean began his life in poverty. He then stole a loaf of bread to feed his family. As a result of this, he went to prison. (all past tense)

https://webapps.towson.edu/ows/tenseconsistency.htm

Verb Tenses in English with JenniferESL

Lesson 2 - Simple Present - Verb Tenses in English

Lesson 3 - Present Progressive - Verb Tenses in English

Lesson 4 - Present Perfect/ Present Perfect Progressive

Lesson 5, Part 1 - Simple Past/ Past Progressive

Lesson 6, Part 2 - Past Perfect / Past Perfect Progressive

Lesson 7, Part 1 - Future with WILL and BE GOING TO

Lesson 8 - Future Progressive and Future Perfect

Lesson 9 - Final Review - Verb Tenses in English

This site explains Past Continuous tense. There are some practice exercises at the bottom of the page.

This site gives some information about Simple Past – Past Progressive. At the bottom, there are some practice activities.

This game gives practice for Past Progressive and Past simple.

Sentence Structure Chart: Positive, Negative and Questions in all 13 English Tenses