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as的6种用法总结及典型句子 as用法( 六 )

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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5 Linda worked for the Minnesota Manufacturing and Mining Company, ________ as 3M.
A. knowingB. known C. being knownD. 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 。
三、用作关系代词的as
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.在此种用法中，同学们要注意与结果状语从句的区别 。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.A句为结果状语从句，而B句则是定语从句 。
2. 引导非限制性定语从句，用来指代整个主句(即先行句)，表示“这一事实，那一情况” 。从句可以位于句首、句中或句末 。例如：We stand when the national anthem is played, as is the custom.
例6 ______ I explained on the telephone, your request will be considered at the next meeting.
A. When B. After C. As D. Since
解析：根据句意，选项C是正确答案 。as表现的正是本点所讲用法 。
四、用作副词的as
修饰形容词或副词，表示程度，意为“同样地” 。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.
五、用在习语中的as
由as构成的习语很多，常见的有：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 。这些习语在高考中可能经常遇到，在高考题中有的作为正确选项，有的作为干扰项，有的出现在题干，值得同学们认真掌握 。例如：
例9 I would like a job which pays more, but ______ I enjoy the work I’m doing at the moment.
A. in other wordsB. on the other hand C. for one thing D. as a matter of fact 解析：选项D极具干扰意义，但进一步研读会发现本题中的两个分句表达了一件事的两个对立面，故选B 。
例10 ——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 aheadD. 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 。
as的用法总结as的全部用法总结如下：
1、as作副词，表示程度，意为“同样地” 。
Jack is as tall as his father 。杰克和他的父亲一样高 。
He doesnt speak English as/so fluently as you 。他的英语说得不如你流利 。
2、as作介词 。
作“如，像”解 。
They got united as one man 。他们团结得像一个人一样 。
作“充当，作为”解 。
As a writer，he was famous 。作为作家，他是很有名的 。
3、as作连词，常用来连接主句和状语从句 。引导时间状语从句，与while意义相近，强调两个动作同时发生，或某事一发生，另一事立即发生 。

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