as引導(dǎo)定語從句時的特殊用法[基礎(chǔ)教資]

1、as引導(dǎo)定語從句時的特殊用法關(guān)系代詞as既可以引導(dǎo)限制性定語從句，也可以引導(dǎo)非限制性定語從句。as可以在從句中作主語、賓語或表語。1. as引導(dǎo)限制性定語從句as引導(dǎo)限制性定語從句， 置于先行詞之后，與其詞義關(guān)系密切，不可分割。如：He is such a good boy as everyone likes.他是大家都喜歡的好孩子。Such machines as are used in our workshop are made in China.我們車間使用的機器是中國制造的。as 常見搭配：1）such+（不定冠詞+）名詞+as引導(dǎo)的定語從句，意思是“像一樣的”。如：The littl

2、e boy realized that there was no such a tank as he dreamed of after he got to the museum.那個小男孩兒到了博物館后才知道沒有他所想象的那種坦克。2）the same+名詞+as引導(dǎo)的定語從句，意思是“同一類事/物”。如：Lao Li bought the same computer as I did.老李買的電腦跟我買的一模一樣。1.as引導(dǎo)非限制性定語從句as引導(dǎo)的非限制性定語從句，既可以放在主語之前，也可以放在主語之后。通常用于下列句型：as is know to all，as is said，as i

3、s reported，as is announced，as we know，as I expected如：As I expected, he got the first place again in this mid-term examination.正如我所預(yù)料的那樣，他在這次期中考試中又得了第一名。2.as引導(dǎo)非限制性定語從句時與which的區(qū)別1）當(dāng)非限制性定語從句置于主語之前時，只能用as。如：As is known to us, the moon travels round the earth.2）從句置于主語之后，且從句有否定詞或表示否定意義時，只能用which。如：Tom was

4、 late for school this morning, which was unexpected.湯姆今天遲到了，這讓人覺得意外。He drinks a lot every day, which his wife doesnt like at all.每天他都喝很多酒，他的妻子一點都不喜歡他這樣。3) 非限定性定語從句中出現(xiàn)expect , think , suppose 等表示猜測、想象、預(yù)料等時，只能用asShe succeeded in her doing the research work , as we expected . 4)固定搭配：such/the same+asExe

5、rcises:1. The British are not familiar with different cultures and other ways of doing things, _is often the case in other countries. A) as B) what C) so D) that2. _might be expected, the response to the question was very mixed. A) As B) That C) It D) What3. I hope all the precautions against air pollution, _suggested by the local gove