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since
学习目标（learning goals）
1. To review the structure of adverbial clauses.
复习状语从句的结构
2. To be able to judge adverbial clauses correctly.
能够正确判断状语从句
3. To be able to put them into use.
能够实际应用状语从句
/?d’ v?:bi?l/
时间
原因
条件
结果
目的
让步
when, as, while, before, after, since, till, until, as soon as
because, since, as
if, unless, as long as
so…that, such…that
so that,
in order that
although, though，whatever , even
though, even if
Adverbial
Clause
地点
比较
where, wherever
as…as, than
not as/so…as ,