1.引导时间状语从句
1),指 “一边…一边…”
The girl sings as she goes to school.
He looked behind occasionally as he went forward in the forest.
2) “随着…的推移/交替”
As time went on / by, she became more and more beautiful.
As children get older, they become more and more interested in everything.
3)表示两个短暂行为几乎同时发生.
I thought of it just as you opened your mouth.
Just as the flying worm hit her face, she gave a loud cry.
(自己联想一下when, while引导时间状语从句时的特点吧)
2. 引导原因状语从句
As =Since "既然"、"由于":
As / Since you're not feeling well, you may stay at home.
As he wasn't ready, we went without him.
(自己联想一下because, for引导原因状语从句时的特点吧)
3. 引导方式状语从句
As =in the way that "像"、"按照……的方式"。如:
Do as I told you.
Remember, you must do everything as I do.
4. as…as…
1) 否定形式 not so …as…
2) + N I cannot afford he asked.
3) +倍数 Our classroom is .
4) as long as
意思一: “和…一样长/长达” I have waited for the news as long as two weeks.
意思二: “只要”---表条件 As long as you work hard, you can probably make certain progress.
5) as far as
意思一: “和…一样远” I walked yesterday, which made me very tired. 意思二: “就…而言”---表观点 As far as I am concerned, smoking is harmful to our health.
6) as well as
意思一: “和…一样好” Lucy sings as well as Lily.
意思二: “和,也”----引导并列的主语要遵循就远原则 He as well as I likes English.
5. 引导让步状语从句“虽然/尽管”
adj. /adv. / n./ V.+as +主语+谓语, ……….
(例句略)
6. 引导定语从句 “正如”
He is very careful, as we all know.
As is well-known, Taiwan belongs to China.
As is often the case with many men, he seems to be having a midlife crisis.
另外,当先行词被the same, such等词修饰时,常用as来引导定语从句。如:
I was reading tHe is a learned professor is welcomed by all the students.
注意:
He is a learned professor 这个句子是such…that…引导的结果状语从句 “如此…以至于….”
7. 特殊句型
………………..as done
I am writing to apply for the post of sales manager in today’s newspaper.
请记住: 只要发现横线后面只有一个单个的过去分词,而此时需要你从4个关系代词中选一个,一定选择as
第二篇：As的用法小结
As的用法小结:
as连词、关系代词、介词、副词:
（一）as连词：
1) 引导时间状语从句， 译成一边…一边…
如:The girl sings as she goes to school.
2)随着…的发展…
如:As time went on / by, she became more and more beautiful .
3)表示两个短暂行为或事情几乎同时发生.
如:I watched her as she read the book.
4)后面接名词表示某一个年龄段时.如: As a young man, he was active in sports.
5) As =Since,引导原因状语从句,
作"既然"、"由于"解, ,常表示显而易见的原因或理由。
如:
As / Since you're not feeling well, you may stay at home.
6) As =in the way that作"像"、"按照……的方式"解,引导方式状语从句。
如:Do as I told you.
7) 用于引导比较状语从句
As… as或not / so/ as …
as中,前一个as是副词,后一个as是连词. 如:They helped the old as much as possible.
I don't speak English so/ as well as she does.
8)表示虽然,尽管,引导让步状语从句,句首常用倒装语序:
adj. /adv. / n/v.+as +主语+谓语+主句。 如: Young as he is, he knows much.
Tired as they were, they walked on.
9） 表示------也一样。
She is a doctor, as was her husband.
（二）as作关系代词,引导定语从句,表示
正如:
As is well-known, Taiwan belongs to China.
另外,当先行词被the same, such等词修饰时,常用as来引导定语从句。
如:I was reading the same book as he
bought yesterday.
（三）、as介词
1. as作状语译为"作为";如:
As a Party member, I'll take the lead in everything. (状语)
2. 表示作为当作。如：I found a job as a guide.
3. 当某人是某身份时。如：As a child, she was sent to abroad.
4.表示好像。如:He dressed as a policeman.
（四）、作副词的用法
1 表示与------等同。如：This dress is twice as expensive as that one.
2 像，如等。如：As before, he remained unmoved.