非限制性定语从句一．限定性定语从句与非限定性定语从句的区别二．引导非限制性定语从句的关系代词有as，which，who， whom，whose等，作定语从句的主语、宾语、表语及定语。
关系副词有when，where等，作定语从句的状语。
关系代词和关系副词在定语从句中一般不能省。
1.who，whom，whose等引导非限制性定语从句时，指代人的普通名词、专有名词等。
表示正是或专指先行词等情况。
在定语从句中作主语、宾语、定语等。
Bob's father，who worked on the project，spent four years in Egypt．鲍勃的父亲从事这项工程，在埃及度过了四年。
His mother，whom he loved dearly， died in 1818．他非常爱戴他的母亲，她死于 1818年。
Mr King，whose legs were badly hurt， was quickly taken to hospital．金先生的腿受了重伤，他很快就被送去住院了。
2.when，where引导非限制性定语从句时，作定语从句的状语。
when=and then， where =and there。
why不引导非限制性定语从句。
He was quickly taken to hospital，where a doctor wanted to examine Mr King's legs．金先生很快被送去住院，在那里一个医生要检查他的腿。
We will put off the outing until next week，when we won't be so busy．我们把郊游推迟到下个星期，当我们不忙的时候。
3.关系代词as和which 引导的定语从句as 和which 引导非限制性定语从句时，其用法有相同之处，也有不同之处。
具体情况是：①as 和which都可以在定语从句中做主语或宾语，代表前面整个句子。
如：He is honest, as / which we can see. 他很诚实，这一点我们看得出来。
②as 引导的非限制性定语从句可以放在主句的任何地方， which 只可放在主句之后。
另外，as 常常有“正如、正像”的含义。
如：As is known to all, China is a developing country. He is from the south, as we can k now from his accent.③当主句和从句之间存在着逻辑上的因果关系时，关系词往往只用which。
如：Tom was late for school again and again, which made his teacher very angry.④当先行词受such, the same 修饰时，关系词常用as。
如：He is not such a fool as he looks.⑤as 引导的非限制性定语从句一些固定句型：as has been said before 如上所述as is well known 众所周知as was expected 正如预料的那样as we all can see 正如我们都会看到的那样非限制性定语从句易错题1. 引导限制性定语从句时，关系代词which可以与that互换；但引导非限制性定语从句时，只能用which。
She heard a terrible noise, ______ frightened her.A. thatB. whichC. whatD. whoShe heard a terrible noise______ frightened her.A. thatB. /C. whatD. who2. 先行词为reason时，限制性定语从句可以用why或for which来引导；非限制性定语从句则只能用for which来引导。
I had told them the reason, ______ I didn’t attend the meeting.A. for whichB. at whichC. for whomD. whyI had told them the reason ______ I didn’t attend the meeting.A. whenB. whichC. whyD. for that3. 引导限制性定语从句的关系代词在从句中担任宾语时可以被省略；但引导非限制性定语从句的关系代词即使作宾语也不能省略。
He was eager to go to the hospital to see his stepmother,______ he loved and respecte d as his own mother.A. asB. whichC. /D. whom4．引导限制性定语从句时并作从句宾语的关系代词whom可以用who来代替；但在非限制性定语从句中，whom就不能用who替换。
Do you know Tom, _____ we talked about?A. whichB. thatC. whomD. whoThe American journalist ______ the announcer mentioned in the news broadcast is sa id to have been killed by the gangsters. Which of the following is wrong?A. whoB. whomC. whoseD. /5．当非限制性定语从句修饰整个主句时，其关系代词只能用as ，不能用which。
此时非限制性定语从句可置于主句之前、之后或之中。
______ I expected, he didn’t believe me.A. WhichB. AsC. ThatD. WhenMary was late for school,______ often happened.A. asB. for whichC. thatD. why6. 由“介词+关系代词”引导非限制性定语从句，关系代词指代整个主句时，不能用as，只能用which。
He bought the car for more than $20,000,______ his father was angry.A. about thatB. with asC. whenD. with whichⅠ.非限制性定语从句练习1.I’m taking some weight-loss pills, _______ are quite popular here.A. thatB. whichC. whoD. which/that2.His daughter, _______ is in Beijing now, is coming home next week.A. whichB. thatC. whomD. who3.My cousin, _______ body is slim, still wants to lose some weight.A. whomB. thatC. whoseD. which4.My pills are in the bathroom, ______ I always keep them.A. whichB. whereC. thatD. who5.We’ll put off the outing until next month, ______ Amy feels better.A. whenB. whereC. whichD. that6.My uncle, _______ I told you about yesterday, is an engineer and is working in Beijing.A. whichB. whoC. whomD. who/whom7.He passed the exam, ________ surprised all of us.A. whichB. whoC. whomD. that8.Jim changed his mind, ______ made me very angry.A. whoB. whomC. whichD. That9.After living in Paris for fifty years he returned to the small town, ______ he grew up as a child.A. whichB. whereC. thatD. when10.You can find whatever you need at the shopping center, ______ is always busy at the weekend.A. thatB. whereC. whatD. which11.Uncle Tom lives in a mountainous village, ______ is two hours’ride from here.A. whereB. in whichC. whichD. that12.I’m leaving for Taiyuan on Sunday, _______ happens to be my birthday.A. whenB. thatC. whichD. it13.It was raining heavily, _______ kept me indoors the whold day.A. thisB. thatC. whichD. who14.Mike, ______ hobby is travelling, has decided to visit the Great Wall next month.A. whoseB. thatC. whichD. who15.Recently I bought an ancient Chinese vase, _______ was very reasonable.A. which priceB. the price of whichC. its priceD. the price of whose16.I have many friends, some _______ are businessmen.A. from whomB. of whomC. from whichD. of which17.China has losts of islands, one _______ is Taiwan.A. of whichB. of thatC. from whichD. from that18.He paid the boys 10yuan for washing ten windows, most of ______ hadn’t been cleaned for at least a year.A.whomB. thatC. whichD. Those19.Mr. Kuxun, some of ______ works(作品) we had read, was one of the greatest writers in the world.A. hisB. whoseC. whomD. which20.The journey around the world took the old sailor nine months, ______ the sailing time was 226 days.A. of whichB. during whichC. from whichD. for which21.Madam Curie, for _____ life had been very hard early in her life, was the first person in the world to receive two Nobel Prizes.A. whoseB. whichC. thatD. whom22.She was educated at Beijing University, _______ she went on to have her advanced study abroad.A. after whichB. from whichC. from thatD. after that23.The man, _______ you borrowed the cinema, has left for Shanghai.A. from whichB. from whomC. from thatD. to who24.I was given three books on cooking, the first _______ I really enjoyed.A. of thatB. of whichC. thatD. which25.I, ______ your best friend, will try my best to help you out.A. who isB. who amC. that isD. that areⅡ.完型填空。