As和which引导非限制性定语从句

As和which引导非限制性定语从句

1．As和which都可以在定语从句中做主语或者宾语，代表前面整个句子。

(1) He married her，as/which was natural.

(2) He was honest，as/which we can see.

2. as 引导非限制性定语从句，可放在主句之前，或者主句之后，甚至可以切割一个主句；which引导的非限制性定语从句只能放在主句之后。另外，as有“正如……，正像……”的意思

(1) As is known to all，China is a developing country.

(2) He is from the south，as we can see from his accent.

(3) John，as you know，is a famous writer.

(4) He has been to Paris more than several times，which I don’t believe.

注意：当主句和从句存在逻辑上的因果关系时，常用which

(5) Tom was always late for school，which made his teacher angry.

3. 当先行词受such，the same修饰时，常用as

(1) I have never heard such a story as he tells.

(2) He is not such a fool as he looks.

(3) This is the same book as I lost last week.

注意：当先行次由the same修饰时，偶尔也用that引导定语从句，但是和由as 所引导的定语从句意思不同

(4) She wore the same dress that she wore at Mary’s wedding. 她穿着她在M ARY婚礼上穿过的一条裙子。

(5) She wore the same dress as her young sister wore. 她穿着和她妹妹所穿的一样的裙子。