状语从句有哪些

1、时间状语从句when while as before until since 等等

2、地点状语从句where wherever

3、原因状语从句because.since.as.for

4、条件状语从句unless.if once

5、目的状语从句so that  in order that

6、让步状语从句whatever whenever.wherever.however

7、比较状语从句than

8、方式状语从句as if as

9、结果状语从句