1、非限制性定語從句非限制性定語從句非限定性定語從句：非限定性定語從句的作用是對所修飾的成分作進一步說明，通常和主句間用逗號隔開，將從句拿掉后其他部分仍可成立1.which引導的非限定性定語從句來說明前面整個句子的情況或主句的某一部分， that不能用于引導非限制性定語從句eg:Herhouse,whichwasbuiltahundredyearsago,stoodstillintheearthquake.2. 有時 as 也可用作關系代詞3.在非限定性定語從句中，用who,whom代表人，用which 代表事物 .4. 當先行詞是專有名詞或物主代詞和指示代詞所修飾時，其后的定語從句通常是非限制性

2、的。eg：CharlesSmith,whowasmyformerteacher,retiredlastyear.Myhouse,whichIboughtlastyear,hasgotalovelygarden.我 去 年 買 的的那幢房子帶著個漂亮的花園。Thisnovel,whichIhavereadthreetimes,isverytouching.這本小說很動人，我已經讀了三遍。5. 非限制性定語從句還 能將整個主句作為先行詞 , 對其進行修飾 , 這時從句謂語動詞要用第三人稱單數，eg：HeseemsnottohavegraspedwhatImeant,whichgreatlyupse

3、tsme.他似乎沒抓住我的意思，這使我心煩。總結：非限制性定語從句只是對主句內容，或先行詞的補充、解釋或附加說明。主句與先行詞或從句之間一般用逗號分開，常常單獨翻譯。沒有它，主句意思仍然完整。引導非限制性定語從句的關系代詞有as，which ，who，whom，whose 等，作定語從句的主語、賓語、表語及定語。關系副詞有when，where 等，作定語從句的狀語。關系代詞和關系副詞在定語從句中一般不能省。注： why不能引導非限制定語從句My success in business,the reasonwhy he dislikes me（限制性） ,has been due to hard

4、work.限制性定語從句和非限制性定語從句限制性定語從句舉例：(1)The teacher told me that Tom wasthe only person that I could miss(2)China isa country which has a long history.非限制性定語從句舉例：(1)His mother,who loves him very much, is strict with him.(2)China,which was founded in 1949, is becoming more and more powerful.限制性定語從句和非限制性定語從

5、句區別：限制性定語從句非限制性定語從句形式上不用逗號和主句隔開用逗號和主句隔開意義上是先行詞不可缺少的定語， 不能刪除是對先行詞的補充說明，刪除后意思仍完整譯法上翻譯成先行詞的定語，“的”通常翻譯成主句的并列句關系詞的A做賓語時可省略A、不可省使用上B、可用 thatB、不用 thatC、可用 who代替 whomC、不用 who 代替 whom要注意區分以下幾個句子的不同(1)His brotherwho is now a doctor always encourages him to go to college.他那當醫生的哥哥常鼓勵他要考上大學。（他還有其他的哥哥）(2)His brot

6、her, who is now a doctor, always encourages him to go to college.他的哥哥是當醫生的，常鼓勵他要考上大學。（他只有一個哥哥）介詞 +關系代詞引導的定語從句關系代詞在定語從句中做介詞賓語時，從句常由介詞+關系代詞引導(1)The school(that/which) he once studied inis very famous.=The schoolin which he once studiedis very famous.(2)Tomorrow I will bring here a magazine(that/which)

7、 you asked for.=Tomorrow I will bring here a magazinefor which you asked.(3)Wel go to hearthe famous singer(whom/that/who) wehave oftentalked about.=Well go to hear the famous singerabout whom we have often talked.注意： 1、有些動詞短語一般不拆開使用，如：look for, look after, take care of等(1)This is the watchwhich/tha

8、t I am looking for.（True)(2)This is the watchfor which I am looking.(False)2. 若介詞放在關系代詞前， 關系代詞指人時用 whom，不可用 who 或者 that ；指物時用 which ，不能用 that ；關系代詞是所有格時用 whose(1)The manwith whom you talked is my friend. (T)(2)The manwho/that you talked withis my friend.(F)(3)The planein which we flew to Canadais ve

9、ry comfortable.(T)(4)The planein that we flew to Canadais very comfortable.(F)3、“介詞 +關系代詞”前可有some, any, none, both, all, neither, most, each, few等代詞或者數詞(1) He loved his parents deeply,both of whom are very kind to him.(2) In the basket there are quite many apples,some of which have gone bad.(3) Ther

10、e are forty students inour class in all,most of whomare from big cities.簡單歸納：介詞關系代詞引導的定語從句 , 關鍵是判斷介詞的選擇分缺少什么介詞 ( 習慣搭配 ), 再則可以通過整個句子整體含義來判斷,方法一是看從句謂語部,結合生活實際來判斷.關系代詞 as由 as, which和 which 引導的定語從句引導的非限定性定語從句，as 和which可代整個主句 ，相當于and this或andthat.As 一般放在句首， which 在句中 .As we know, smoking is harmful to on

11、e's health.The sun heats the earth, which is very important to us.as和 which 引導非限制性定語從句，有相同之處也有不同之處。具體情況是：1 as 和 which 都可以在定語從句中做主語或者賓語，代表前面整個句子。(1) He married her,as/which was natural.(2) He was honest,as/which we can see.2. as 引導非限制性定語從句，可放在主句之前，或者主句之后，甚至可以切割一個主句；which 引導的非限制性定語從句只能放在主句之后。另外， a

12、s 有“正如，正像”的意思(1)As is known to all, China is a developing country.（主句之前）(2)He is from the south,as we can see from his accent(口音).（主句之后）(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：當主句和從句存在邏輯上的因果關系時，常用which(5) Tom was always late

13、for school, which made his teacher angry.3. 當先行詞受 such, the same 修飾時，常用 as(1) I have never heard such a storyas he tells.(2)He isnotsuch a foolas he looks .(3)Thisisthesame book as Ilostlastweek.簡單歸納 : as ,which均可以引出非限制性定語從句,如都指前一句話的意思 , 二者可以互換。as 引導的從句可以放在句首 , as 本身有“正如 . ，正像”一類的含義，與之連用的詞有 know, se

14、e, expect, announce, point out等。此外 , 在 the same as、 such.as .中as引導的是 限制性定語從句.課堂練習place _interested me most was the Children's Palace.A. WhichB. whereC. whatD. in whichyou know the man _A. whom I spoke B. to who spokeC. I spoke toD. that I spokeis the hotel _last month.A. which they stayedB. at t

15、hat they stayedC. where they stayed atD. where they stayedyou know the year _the Chinese Communist Party was foundedA. whichB. thatC. whenD. on whichis the day _I'll never forget.A. whichB. on whichC. in whichD. whenfactory _we'll visit next week is not far from here.A. whereB. to whichC. wh

16、ichD. in whichchanges have taken place since then in the factory _we are working.A. whereB. thatC. whichD. thereis one of the best films _.A. that have been shown this yearB. that have shownC. that has been shown this yearD. that you talkedyou lend me the book _the other dayA. about which you talked

17、B. which you talkedC. about that you talkedD. that you talkedpen _he is writing is mine.A. with whichB. in whichC. on whichD. by which課后練習arrived at a farmhouse, in front of _sat a small boy.A. whomB. whoC. whichD. thatengineer _my father works is about 50 years old.A. to whomB. on whomC. with which

18、D. with whomthere anyone in your class _family is in the countryA. whoB. who'sC. whichD. whose'm interested in _you have said.A. all thatB. all whatC. thatD. whichwant to use the same dictionary _was used yesterday.A. whichB. whoC. whatD . asisn't such a man _he used to be.A. whoB. whomC

19、. thatD . asis good at English, _we all know.A. thatB . asC. whomD. whatMing, _to the concert enjoyed it very much.A. I went withB.with whom I wentC. with who I wentwent with himdon't like _ as you read.A. the novelsB. the such novelsC. such novelsD. same novelstalked a lot about things and pers

20、ons _they remembered in the school.A. whichB.thatC. whomD. whatletter is from my sister, _is working in Beijing.A. whichB. thatC. whomD. whoour factory there are 2000 workers, two thirds of _are women.A. themB. whichC. whomD. who're the person _I've ever met _could do it.A. who;/B./; whomC. whom;/D./; wholost a book, _I can't remember now.A. whose titleB.