Question

Which clause in the sentence below is an adverb clause?

We will go to the movies, and then you can visit your friend after you clean your room

Answer 1

So, adverb clauses tend to provide extra information on where, when, why, how, how much, or under what condition.
They give more information about an action, and are introduced with a subordinating conjunction (must know what these are first !).
Our action here is visit, so we need to know WHEN.