as用法小结

as用法小结

摘要：在高中阶段，我们经常会遇到一词多义一词多用现象，

了解和掌握高中常见的这方面的知识，对于高中的英语学习至关重要。本文着重论述as的一词多用，从归类，例句和例题三位一体

的角度对as的用法进行剖析和总结归纳，力争对as的用法达到全面透彻的掌握，并由此引起英语学习者对一词多义一词多用现象的重视。

关键词：一词多义；一词多用；as的用法；归类；例句；例题中图分类号：g623.31

在高中英语中，牢固掌握as的用法十分重要。为了更好地认知、理解和运用as，现就as的用法做一总结归纳，愿与共同商榷、改进。

1. as做介词

（1）.好像（某人）： he dressed as a policeman.

（2）.当作，作为：①. he treated me as a friend. ②. as a student，you should study hard.

2. as做副词

as... as... 结构：用于副词和形容词之前，以构成比较句型：he is as tall as his father.

注意：省略了的as：

以下举例说明：

the pianos in the other shop will be _____，

but _____.

a.cheaper；not as better

b. more cheaper；not as better

c.cheaper；not as good

d. more cheap；not as good

本题考查形容词的比较级用法。as+原级+as... 否定为：not as/so+原级+as... 根据上下文可采用省略形式，即可省略第二个as。该题题意是”另一家商店的钢琴会便宜些，但不如这家商店的好。”可知but 后应为否定的原级比较”not as good as those in this shop”。又因cheap的比较级形式是cheaper，不是more cheap，故答案为c。

3. as做连词

（1）.在...期间，当...的时候：。i watched her as she combed her hair.

（2）.由于，因为。引导原因状语从句：。as you weren’t there，i left a message.

（3）.引导让步状语从句（=although），从句倒装。

①.child as he is，he knows a lot. （=although he is a child，...）

②.young as he is，he knows a lot.

③.try as he may，i don’t think he can succeed.

④.much as i like the car，i can’t afford

it.

（4）.如同，按照。引导方式状语从句。

①. when in rome，do as romans do.

②. why didn’t you catch the last bus as i told you to？

（5）.引导倒装结构句式，意为”......也一样”。

our eating habits have changed，as has our way of life.

所以上句可理解为：

our eating habits have changed，and our way of life has changed，too.

再举两例：

she is tall，as are both her parents.

he is a doctor，as ____ his wife before she had children.

a. was

b. is

c. did

d. does 答案：a

4. as作关系代词

关系代词是用来引起定语从句的。它一面代表定语从句所修饰的那个名词（或代词），一面又在从句中担任一个成分，如主语，宾语，表语或定语。常见的关系代词有：who，whom，whose，that，which.但在高中英语中，我们要特别注意：as也可以用作

关系代词。

关系代词as：

（1）.引导限制性定语从句，常和the same，such，so，as 等连用：

①.such books as you bought are very useful.

②.i have the same trouble as you （have）

③.it’s as pleasant a film as i have ever seen.

④.she is so clever a girl as we all like.

注意：the same 后的关系词还可为that，试比较：

①this is the same book as you bought.（同一类）

②this is the same book that you bought.（同一个）

（2）.as引导非限制性定语从句和which 的区别：

位置：as引导的从句可以放在句前，句中或句尾，而which 引导的从句通常放句尾.

指代：as指代主句内容，而which可指代主句也可指代先行词.

语义：as可译为”正如，正像”，而which无语义。

①.as we all know，china is a country with a long history.

②.he opposed the idea，as could be expected.

③.cyprus，as you know，is an island in the