Students will select the appropriate conjugation of a verb in a present tense sentence, then rewrite the sentence in past and future.
I have found this very effective in helping elementary ESL students understand patterns of conjugation and agreement (such as adding 's' in the present for "he/she/it") as they work through the sentences.
While I use this as a teaching tool, it could also easily serve as an assessment.
Answer Key included!
See my store, ESL by Michelle, for similar exercises with irregular verbs.