as ，which 引导定语从句的辨析与练习
as 与 which都可以引导一个没有先行词的定语从句，as和which用来代替整个主句或主句中的一个短语。
它们的区别是：
as 引导的从句可以放在主句的前、中、后。对主句起补充说明的作用，解释主句的依据，强调主句确定性等，译为：“正如；由...而知”。从句动词多表示消息来源，如：see，know，expect。结构形式多为：as we know 或 as is known。
which 引导的从句一般都放在主句的后面。说明主句产生的结果，或对主句的内容作出判断，译为：“这...”= and this or but this。从句动词多表示使让、或结果，如：make，break。结构形式多为：which makes me sad或 which is a plan。
以上内容列表如下：
项目 as which相同点没有先行词，代替整个主句或主句中的一个短语。区别 位置在主句的前、中、后。在主句的后面。语境补充说明依据，证明主句的确定性。主句产生的结果，对主句作出判断。翻译正如；由...而知这= and this/ but this动词see,know，expect，imagine，believemake,cause,encourage,break,reach结构as we know ; as is supposedwhich made us sad; which is sad.
1. He said that he was invited, ______ was a lie.
2. _____ can see from the letter he wrote, she is a talented journalist.
3. _____ was expected, he performed the task successfuly.
4. Where there is smoke, there is fire, ______ you know.
5. He said that he lost the book, ________ was untrue.
6. It was raining hard, ______ kept us indoors.
7. Harry is unusaually tall, _______ are his brothers.
8. ________ all his friends agree, he was unusually warm-hearted, loving and generous.
9. They rely on themselves, _______ is much better.
10. Whenever I met him, _______ was fairly often, I like his sweet and hopeful smile.
11. He invited us to dinner, _____ was very kind of him.
12. I am _______ you can imagine short enogh of money.
13. He changed his mind, ______ made me angry.
14. Rats ran about the attic(阁楼) all night, _______ kept her awake.
15. There is great disorder, ______ the newspaper will have told you.
16. He has to work on Sundays, _______ he doesn`t like.
17.Shelley,_______ we had seen, had met her through his uncle.
18. Jack drove too fast , ______ was reckless(不计后果的).
19.Anyway, that evening, ________ I`ll tell you more about later, I survived the traffic accident.
A. when B. where C. what D. which
Keys: 1 which 2 As 3 As 4 as 5 which 6. which 7as 8 As 9 which 10 which 11 which 12 as 13 which 14 which 15 as 16 which 17 as 18 which 19D
