Question

Which sentence contains an adverb clause?

A.
Yosemite National Park, in central California, covers nearly 1,200 miles of mountainous terrain.

B.
When you return from California, take a taxicab from the airport.

C.
California has three of the top ten most populated cities in the United States.

D.
The state of California is also called the Golden State.

Answer 1

Answer: B When you are looking for an adverb clause, you are searching for a word that will modify the verb in the sentence. Adverbial clauses will ask questions like how, when, where, etc.... A clause will need to have a subject and a verb. In this case, "When you return..." is the adverbial clause.