The verbs are to do & finish. A verb is a word describing an action, therefore is isn't a verb. I always think can to go before it.
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AnonymousSubject - What you need to doYou can't have an object after a linking verb like "is". That is, you can't call it that.
Verb - isObjectPredicate Nominative - finish your homework
Anonymous'What you need to do is to finish your homework'