This is “Verb Tenses”, section 1.6 (from appendix 1) from the book Writers' Handbook (v. 1.0). For details on it (including licensing), click here.
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You can practice conjugating many English verbs to increase your awareness of verb tenses. Use this format for the basic conjugation:
You can also practice completing these five forms of English. A mixture of tenses is used to show that you can practice the different forms with any tense.
See Chapter 15 "Sentence Building", Section 15.2 "Choosing Appropriate Verb Tenses" for an in-depth overview of verb tenses.