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Iffy Verbs

Sentences with if clauses can pose special problems. While these sentences may be about real possibilities, they may also present unlikely, imaginary or impossible situations. As a result, their verbs often take an unusual form. If you think you are up to the challenge, try your hand at the questions below. Choose the best answer in each case.

(For more information on verb tenses, read Using Verb Tenses, Using Verb Tenses in Sequence and Tenses in conditional sentences.)