adverbial clauses: Subordinate clauses that act as adverbs. Adverbial clauses tell us when, where, how, why, and to what extent something happened.
When: (Answers when something happened)
While you were out, someone called.
Before he came, he called.
As soon as you are finished, call me.
Why: (Answers why something happened)
I ordered two pizzas as we were all hungry.
I failed because I didn't study.
I fixed it so that anybody could use it.
Where: (Answers where something happened)
This card is accepted wherever you go.
How: (Answers how something happened)
She talked as if she were a princess.
He swam as if he were a fish in the sea.
Ideas commonly expressed by adverbial clauses are:
time - when, as soon as, before
place - where, wherever
manner - as if
degree - than, as ____ as _______
reason, purpose or cause - because, since, so that
condition - if, unless
concession - although, even though,