Question

Which sentence contains an adverb clause?
a. Before you go to bed, make sure the oven is turned off.
b. Mom prepared ham with pineapple slices, rice, and corn on the cob for dinner.
c. My mom grows many kinds of herbs in our backyard garden.
d. Mom put the leftovers in the refrigerator for tomorrow's lunch.

Answer 1

An adverb clause means that it has to be a full clause functioning like an adverb. This is the case in a): Before you go to bed,

It's a clause ("in our backyard garden| also has the function of an adverb but it's not a clause) and it's an adverb clause!