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UKiset英语语法：一篇文章搞定AS四大用法

UKiset考试以智能的方法考核学生的学习能力和发展潜能，是帮助识别候选人的优缺点和学习偏好的一种标准化测评。由英国加比达斯、杜伦大学、剑桥英语参与试题设计并得到英国领事馆文化教育处对考试的全程监督。下面就和小编一起看看今天的语法考点吧。

一、用作连词的as

1.引导时间状语从句，表示“当……的时候”，其用法与when和while类似。

例如：As a child (When he was a child), she was sent to six different schools.

此用法中as多表示从句与主句动作同时进行，意为“一边……一边……”，一般不与状态动词连用。

例如：She sang songs as she did her homework.

as还可以表示一动作紧接着另一动作发生，说明另一动作的结果，有“随着……”的含义。

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. sinceB. whenC. asD. that

解析：本题的as中与when一起作为干扰项，容易使考生往时间状语从句上思考，事实上本题是强调句，正确选项是D。

UKiset英语语法：一篇文章搞定AS四大用法

2.引导原因状语从句，表示“由于，因为”，相当于because,但通常置于句首。

例如：As he is a qualified doctor, I trust his advice on medical matters.

3.引导让步状语从句，通常可与although或though通用，但语序不同，although或though用于句首，as用于倒装结构。

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. SinceB. UnlessC. AsD. Although

解析：as虽然有引导让步状语从句用法，但本题不是倒装结构，故正确答案应是D。

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 outB. turn outC. go onD. come up

解析：本题考查动词词组辨析，题干中的“as planned”给同学们提供了重要信息，答案选B。

5.固定句型：“主句，as +be/do+主语”表示“也一样”。

例如：She’s unusually tall, as are both her parents./He’s a doctor, as was his wife before she had children.

二、用作介词的as

1.表示“如，像”。

例如：They got united as one man./She spoke of me as her dearest friend.

2.表示“作为、当作”。

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. knowingB. knownC. 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5 ______ I explained on the telephone, your request will be considered at the next meeting.

A. WhenB. AfterC. AsD. 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。

例6 _______ is our belief that improvements in health care will lead to a stronger, more prosperous economy.

A. AsB. ThatC. ThisD. It

解析：本题中的as项干扰性很强，容易误选。实际上句中that引导的应是真正的主语从句，it充当形式主语，故选D。如果将题干中的that换为逗号，则必须选as。