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Verb Forms and Tenses

Keep tense consistent unless the time really changes, and use the right form after helping verbs.

The rules

  • Use the simple past for finished actions, the present perfect (has/have + past participle) for actions that continue to now, and the past perfect (had + participle) for an earlier past action.
  • Match the tense of nearby verbs unless there is a time word that signals a shift.
  • After has, have or had, use the past participle: has gone, had written, have begun.
  • After would, could, should and must, use the base verb: would go, not would went.
Watch out: Mixing past and present in the same story. Look for the time clues, and keep one tense unless the time changes.
Worked example

By the time we arrived, the movie _____ already started. (has / had)

  1. "By the time we arrived" sets a past moment.
  2. The movie started before that, so use the past perfect.
  3. The answer is "had."

Answer: had

Try it yourself

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