副词性从句，也称为状语从句。
与对等性从句（即关系从句）相比，多了不可省略的连接词；与名词性从句比较，副词性连接词有包含逻辑关系的词义。
状语从句连接两个完整句，中间用连接词连接。连接词连接的那个句子，即为附属句。
重点在于认识各种连接词。
以下为状语从句分类和连接词整理，以及句例练习。

一、时间、地点
1.1 时间类：
when, while, as,? ?/? before, after? /? ?till/until, since……
the minute, the moment, the second, every time, the day，the instant, immediately , directly, no sooner … than, hardly …when , scarcely … when,as soon as
eg————
i will go swimming after i have dinner.
1.2 地点类：
where、wherever，anywhere, everywhere.
eg————
he plays with kids where there are many apple trees.

二、原因、结果
2.1?原因类：
because, as,?for…
since（既然）, now(that), seeing (that), considering (that), given (that),?
eg————
as you have finished work, you can go out for fun.
you can go out for fun because you have finished work.
2.2?结果类：
so—- ,so… that, such … that, so that…, such that…, to the degree that, to the extent that, to such a degree that
eg————
she is so pretty that many boys like her.
he is good at sports so the boys add him to the basketball team.
(ps: 不清楚so和so that的区别)

三、条件
if, unless, whether(whether…or not)、as/so long?as只要,
?only if, provided that, supposing that假设, in case（美语表条件，英语表目的）, on condition that
eg————
he could arrive if he promised. /??if he promised,?he could arrive.
i can do it as long as paid is enough. / as long as paid is enough,?i can do it.

四、目的
so that, in order that?目的是……
lest, in case, for fear that，in the hope that, for the purpose of , to the end that
eg————
get up

early so that you wont be late.
make a note in case of missing something important.

五、让步
though, although,while, even though/ if (虽然，不管如何)
as(用在让步状语从句中要倒装)while ( 一般在句首 )，no matter …， in spite of the fact that, whether, rwhatever, whoever, wherever, whenever, however, whichever
wh-拼法 = no matter…
whether = no matter
whoever = no matter who
whichever = no matter which
however = nomatter how
wherever = nomatter where
whenever = no matter when
eg————
no matter where/ (wherever) you go, i will find you.
although its dangerous, i want to have a try.

六、限制（至于、在xxx方面）
as far as、in that (in the sense that – 就xxx而言）
eg————
as far as music, he is a genius.
he is brave in that he jumped?over a river.

七、方法、状态（就像……）
as, as if, the way
eg————
he played the piano as mozart played / does.
he sleeps as if he was dead.
i like talking with you

the way you were talking with me before.

八、比较状语从句
as(同级), than
the more … the more …, just as …， so…, a is to b what/as x is to y, no … more than, not so much a as b
（ps 这好像是国内教材比较普遍的分类）
eg————
the more you eat, the more you are fat.
you could get everything more than you want.