其實(shí)啊，昨天分享的“3個(gè)句式、2個(gè)注意”只是as引導(dǎo)限制性定語(yǔ)從句，人家還可以引導(dǎo)非限制性定語(yǔ)從句呢！厲害吧，那引導(dǎo)這種從句又有哪些知識(shí)點(diǎn)呢，且聽(tīng)小編我慢慢道來(lái)。

as引導(dǎo)非限定性定語(yǔ)從句時(shí)（有逗號(hào)隔開(kāi)），只能修飾整個(gè)主句。

1). 可置于主句之前、之后或主謂之間，翻譯成“正如...那樣”。例如：

As we all know, the earth moves around the sun. (從句位于主句之前）

The earth moves around the sun, as we all know. (從句位于主句之后）

The earth, as we all know, moves around the sun. (從句位于主謂之前）

2). 在非限制性定語(yǔ)從句中，which和as的區(qū)別：

a. 位置：

as引導(dǎo)的從句可以放在主句前、主句后、主謂之間；

which引導(dǎo)的從句不能放在主句前。

As is known to all, he is the best student in our class. （??）

Which is known to all, he is the best student in our class. （??）

As was expected, he succeeded at last. （??）

Which was expected, he succeeded at last. （??）

b. 含義：指代一個(gè)句子時(shí)，as是“正如/就像”之意；which是“這/這件事”之意。

常見(jiàn)句式：

as is said above 正如上文提到的；

as is expected 正如大家所料；

as is known to all, 正如大家都知道的；

as is reported in the newspaper, 正如報(bào)紙上報(bào)道的；

As is said above, he studies very hard.

正如上文提到的，他學(xué)習(xí)非常努力。

Li Ming was late, which made Mr. Zhang very angry.?

李明遲到了，這件事讓張先生很生氣。

c. 介詞后只能用which。例如：

He had studied computer for one year, after which he found a job in a big company. （??）

He had studied computer for one year, after as he found a job in a big company. （??）

Scientists have advanced many theories, none of which has been proved. （??）

Scientists have advanced many theories, none of as has been proved. （??）

小Tip：針對(duì)as/which引導(dǎo)的非限制性定語(yǔ)從句，考點(diǎn)有三：

1). as“正如”的常見(jiàn)句式；

2).as引導(dǎo)的從句可位于句首，但which不行；

3). 介詞后只能用which，不能用as。

【摘自：百詞斬】