.
一、状语从句分类及常用连词：
类别连词
时间状语从句when, whenever, while, as, before, after, since, till, once, as soon
as,etc.
地点状语从句where,wherever
原因状语从句because, since, as, for, now that, etc.
结果状语从句so that, so that, such that, that, etc.
目的状语从句in order that, so that, that, etc.
条件状语从句if, unless, as(so)long as, etc.
让步状语从句though,although,even if, even though,however,whatever, as,etc.
比较状语从句as as, so as, than, etc.
方式状语从句as, as if, as though, etc.
二、相似连词的用法区别
1.when, while, as,
while表时间，从句需用延续性动词，切不可用瞬间动词。

when表时间，从句既可以用延续性动词，又可以用瞬间动词。

as 表时间，与when相似，但侧重强调主从句动作同点或同段进行。

when, while后可以接分词短语。

2.because, as, since, for
.
语气位置意义
because 最强前或后“原因”；表客观因果关系；回答“”as 较强前“由于”；把众人所知的事实当作理由since 较弱前“既然”；就对方陈述的事实作为理由for 最弱后“理由”；对某一事实进行推断的理由
注：上面所说的“前” ，指从句在主句之前；“后”，指从句在主句之后。

3.so that, so that, such that
so that“以便”、“结果”表目的和结果。

注意：在从句中有情态动词表目的。

无情态
动词表结果。

so that“如此的以致于”表结果。

该结构常见于：
1.so+ 形／副＋ that
2.so+ 形＋ a(an) ＋单数名词＋that
3.so ＋ manymuch＋复数名词（不可数名词）+that
such that“如此的以致于”表结果。

该结构常见于：
1.such ＋a(an) ＋形＋名词＋that
2.such ＋形＋复数名词／不可数名词＋that
4.though, although, as,
though, although在句首表“尽管”两者都可以用。

但句后不能再用but 。

下列情况只能用though：
.
▲as though (=as if);even if (=even though) ▲在句末表示“然而”
as 表示“尽管” ，从句的表语、状语等成分要倒装。

5.whatever, however,wherever, whenever
它们是 what, how, where, when的强势语气。

分别等于：no matter what,no matter how
no matter where,no matter when
状语从句种类一卡通
.
状语从句种类引导的连词
时间状语从句When, whenever, while, after, before, as, since, till, as soon as, until, once, on sooner than,hardly (seldom,
scarcely)when, the moment, every time, each time, the
instant, the first time
地点状语从句Where, wherever
原因状语从句Because, since, as
条件状语从句 If, unless, so (as) long as, in case, on condition that, given
that, provided that
让步状语从句Though, although, while, even though, even if, no matter, however, whatever, whether or
方式状语从句 As, as if, as though
目的状语从句 So that, in order that, that
结果状语从句So that, such that, so that
比较状语从句Than, as as, the more the more。