Name the complete verb in the sentence "sue will often go to the movies on Saturday."

The answer is will go

Verb is a figure of speech that does action. In addition, a complete verb can include adverbials and prepositions. In this example, the action word is 'go'. But if we are talking about the complete verb, the answer should be 'will often go". This phrase altogether gives Sue not only an action, but also the frequency of the action.