as引导什么从句，要有例句，1例如：1.定语从

参考一下吧：

1.As可以引导定语从句.有时可译为“正如”.此时,常常是as从句在前,主句在后.

例如：As

we

can

see,he

is

a

Chinese.

2.As

还可引导原因状语从句,“因为,由于”

例如：As

he

is

so

lazy,he

never

cooks

by

himself.

3.As还可引导时间状语从句,“当,随着”

例如：As

the

weather

is

colder

and

colder,the

leaves

of

the

tree

is

less

and

less.

4.As还可引导方式状语从句,“按照”

例如：You

must

do

the

work

as

I

have

told

you.

5.As还可引导让步状语从句.“尽管”.但是注意,as引导方式状语从句时从句必须倒装.而且这种倒装和一般的倒装不一样.as从句的倒装一般是把从句的表语或作状语的副词提到as之前,（如果表语是一个带有不定冠词a或an的单数名词,倒装后a或an必须省略).

例如：Though

he

is

a

little

boy,he

knows

a

lot.如果变成由AS引导,就必须变成：

Little

boy

as

he

is,he

knows

a

lot.

Though

he

works

hard,he

never

succeed.

可变为

Hard

as

he

works,he

never

succeed.