Read the sentence.

I would have worked all summer.

Which is the verb phrase?

a I would

b have worked

c would have worked

d worked all

c would have worked

The verb phrase in the sentence "I would have worked all summer" is "would have worked."

To identify the verb phrase, we need to look for the main verb and any auxiliary (helping) verbs that occur together. In this sentence, the main verb is "worked," and the auxiliary verbs are "would" and "have." The auxiliary verb "would" indicates a conditional or future past action, and "have" is a helping verb used to form the perfect tense.

Therefore, the correct answer is c) "would have worked."