as在限制性定语从句中的以用法及as与that的区别.

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as在限制性定语从句中的以用法及as与that的区别.
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as在限制性定语从句中的以用法及as与that的区别.
as在限制性定语从句中的以用法及as与that的区别.

as在限制性定语从句中的以用法及as与that的区别.
as 可以用作关系代词,在限制性定语从句中 ,多同such 或the same 连用,构成 such.as
和 the same...as结构 .as 的先行词可以是人或物.如
he is not such a fool as he looks.他貌似憨傻 实则不然.
the same ...as 表示同一类的 如 this is the same book as i bought yesterday.
the same...that 表示同一个 如 this is the same book that i am looking for.
不过 有时区别不大 可以互换
如 we drove out of the town by the same road as/that we had entered by.
我们从进城的原路开车出城去.

当先行词被such 修饰时,定语从句需用as 引导,
如: It is such an easy question as every one can work it out .
当先行词被the same 修饰时,用as 或that 都可以,但意思不同。the same ...as (指同样或同类的);the same ....that (指同一个)。如:I have the ...

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当先行词被such 修饰时,定语从句需用as 引导,
如: It is such an easy question as every one can work it out .
当先行词被the same 修饰时,用as 或that 都可以,但意思不同。the same ...as (指同样或同类的);the same ....that (指同一个)。如:I have the same book as you have 。 This is the same watch that I lost .

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as引导定语从句,其实不是专指限定性定语从句。而是一种特殊的定语从句。
as做关系代词,主要分3种:
1:构成such...as的结构。可以看做是固定表达,所以不能用that替换as。
e.g. We have such apples as you never saw.我们有你从未见过的苹果.
2:such 和as连在一起,也可以看做是固定表达,不能替换that。<...

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as引导定语从句,其实不是专指限定性定语从句。而是一种特殊的定语从句。
as做关系代词,主要分3种:
1:构成such...as的结构。可以看做是固定表达,所以不能用that替换as。
e.g. We have such apples as you never saw.我们有你从未见过的苹果.
2:such 和as连在一起,也可以看做是固定表达,不能替换that。
e.g. There was a look of fear in his eys,such as people have when they are suddenly awakened.
他眼中透露出一种人们突然被叫醒时,露出的惊恐。
3:as可以单独引导定语从句,指代整个句子。
e.g.He was a foreigner, as I knew from his accent.
从他的口音中,可以听出是个外国人。as指代He was a foreigner的整个句子。
关于that:
在限定性定语从句中,作为从句的先行词,是不能用逗号和主句隔开的。
另外,that指代的名词,在主句中通常做主语或者宾语。这时可以和which替换。
e.g. These are the books which/that I ordered.
如果有介词提前,也就是从句的介词放到先行词的前面,只能用which不能用that。

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