例如：As a child (When he was a child), she was sent to six different schools.
例如：She sang songs as she did her homework.
例如：As time went by, we found he was an honest man./As he grew older, he lost interest in everything except gardening.
例1 It wasn’t until nearly a month later________ I received the manager’s reply.
A. since B. when C. as D. that
例如： As he is a qualified doctor, I trust his advice on medical matters.
例如：Young as I am, I already know what career I want to follow. /Although（或Though）I am young, I already know what career I want to follow.
as 表示让步用于倒装结构，通常将从句的表语、状语或动词前置。如果表语有冠词a/an, 需去掉。例如：Great scholar as he is, he is lacking in common sense./Much as I like you, I couldn’t live with you./Try as he would, he couldn’t open the door.
例2 _____ he has limited technical knowledge, the older worker has a lot of experience.
A. Since B. Unless C. As D. Although
4.引导方式状语从句，表示“如，像”,相当于in the way that 。
例如：When in Rome, do as Romans do./Do to others as you would have others do to you.
例3 We wanted to get home before dark, but it didn’t quite ________ as planned.
A. make out B. turn out C. go on D. come up
例如：She’s unusually tall, as are both her parents./He’s a doctor, as was his wife before she had children.
例如：They got united as one man./She spoke of me as her dearest friend.
例如：As a League member, you should think more of others./After graduating from the college, he firstly worked as a clerk in a big company.
3.与某些动词搭配，表示“把……当作……”，如：look on…as…, regard…as…, treat…as…, consider…as…, think of…as…, see…as…等。其中consider…as…中的as可以省略。as与famous或known搭配，表示“作为……而出名”。
例4. Linda worked for the Minnesota Manufacturing and Mining Company, ________ as 3M.
A. knowing B. known C. being known D. to be known
解析：如果熟悉be known as这一短语，运用有关非谓语动词的常识，可选出正确答案B。
1.引导限制性定语从句，先行词前通常有as, so, such, same等修饰语。
例如：He will marry as pretty a girl as he can find./My hometown is no longer the same as it used to be./As many people as are present will be given a present.
比如：A: The teacher asked us such a difficult question that none of us could answer it.
B: The teacher asked us such a difficult question as none of us could answer.
例如：We stand when the national anthem is played, as is the custom.
例5 ______ I explained on the telephone, your request will be considered at the next meeting.
A. When B. After C. As D. Since
例6 _______ is our belief that improvements in health care will lead to a stronger, more prosperous economy.
A. As B. That C. This D. It
例7 Danby left word with my secretary ________ he would call again in the afternoon.
A. who B. that C. as D. which
例如：He swims fast, but I swim just as fast.
但它通常构成表示比较的结构“as…as…”，“not as…as…”。此结构中第一个as是副词，第二个as是连词。否定结构中的副词as可以由so代替。as…as possible /one can也属于此用法。
例如：It is generally believed that teaching is as much an art as it is a science.
The movie was not as good as I had expected./I play tennis as well as him .
as soon as “一……就”，引导时间状语从句；
as/so long as “只要”引导条件状语从句；
as if/though “好像，仿佛”，引导方式状语从句或表语从句；
as to/ as for “至于，就……而言”；
as much/many as“多达……”；
as/so far as “就……的限度”；
as a result，
as a result of “（由于……的）结果”；
as a matter of fact“事实上”；
as well “也、还”；
A as well as B“不但A而且B”；
as it is“照现状看，看样子”，等等。
例8 I would like a job which pays more, but ______ I enjoy the work I’m doing at the moment.
A. in other words B. on the other hand C. for one thing D. as a matter of fact
例9 ——People should stop using their cars and start using public transport.
——______. The roads are too crowded as it is.
A. All right B. Exactly C. Go ahead D. Fine
解析：本题选项中虽没有as内容，但题干中的as it is却是解题的关键信息，正确选项为B。
例10 Maggie has been fortunate to find a job she loves and, _____, she gets well paid for it.
A. sooner or later B. what’s more C. as a result D. more or less
例11. The winter of 1990 was extremely bad. _______ most people say it was the worst winter of their lives.
A. At last B. In fact C. In a word D. As a result
解析：选项D. As a result起干扰作用，正确选项为B。