Unit 9语法导学案：定语从句专题讲解一、基本概念：在复合句中，修饰某一名词或代词的从句叫定语从句。
Do you know the man who spoke at the meeting just now?That is the house where h e lived ten years ago.定语从句所修饰的词叫先行词；定语从句一般用关系代词或关系副词来引导，关系词放在先行词与定语从句之间起连接作用，同时又作从句中的一个成分。
引导定语从句的关系代词有：that,who,whom,whose,which，as关系副词有：（1）当定语从句中含有介词，介词放在句末时，who，that，which可省略，但介词在关系代词前时，只能用“介词+which/whom”结构。
例如：This is the house in which we lived last year.这是我们去年居住的房子。
Please tell me from whom you borrowed the English novel.请告诉我你从谁那借的这本英文小说。
（2）含有介词的固定动词词组中，介词不可前置，只能放在原来的位置上。
例如：This is the person whom you are looking for. 这就是你要找的那个人。
（3）that 作介词的宾语时，介词不能放它的前面，只能放在从句中动词的后面。
例如：The city that she lives in is very far away.她居住的城市非常远。
（4）关系词只能用that的情况：a. 先行词被序数词或形容词最高级所修饰，或本身是序数词、基数词、形容词最高级时，只能用that，而不用which.例如：He was the first person that passed the exam. 他是第一个通过考试的人。
b.被修饰的先行词为all，any，much，many，everything，anything，none，the one等不定代词时，只能用that，而不用which.例如：Is there anything that you want to buy in the shop？你在商店里有什么东西要买吗？c.先行词被the only，the very，the same，the last，little，few 等词修饰时，只能用that，而不用which.例如：This is the same bike that I lost.这就是我丢的那辆自行车。
d. 先行词里同时含有人或物时，只能用that，而不用which.例如：I can remember well the persons and some pictures that I saw in the room.我能清楚记得我在那个房间所见到的人和一些照片。
e.以who或which引导的特殊疑问句，为避免重复，只能用that.例如：Who is the girl that is crying？正在哭泣的那个女孩是谁？f.主句是there be 结构，修饰主语的定语从句用that，而不用which.例如：There is a book on the desk that belongs to Tom. 桌子上那本书是汤姆的。
（5）关系词只能用which，而不用that 的情况：a.先行词为that，those时，用which，而不用that.例如：What‘s that which is under the desk？在桌子底下的那些东西是什么？b.关系代词前有介词时，一般用which，而不用that.例如：This is the room in which he lives. 这是他居住的房间。
c.引导非限制性定语从句，用which，而不用that.例如：Tom came back，which made us happy. 汤姆回来了，这使我们很高兴。
五、关系副词的用法（1）when指时间，其先行词表示时间，在句中作时间状语。
它的先行词通常有：time,day,morning,night,week,year等例如：This was the time when he arrived.这是他到达的时间。
（2）where指地点，其先行词表示地点，在句中作地点状语。
它的先行词常有：place,spot,street,house,room,city,town,country等。
例如：This is place where he works.这是他工作的地点。
注意：先行词表示地点,不一定都用Where引导定语从句一般来说,英语学习者的脑海中会形成这样一个概念:在定语从句中,如果先行词是表示地点的名词(如place等),就用关系副词where引导定语从句。
这种想法是错误的。
如果定语从句不缺少主语或宾语,而是缺少地点状语,便用where来引导;如果定语从句不缺少状语,而是缺少主语或宾语,则要用关系代词(which或that)来引导,以补足定语从句中所缺失的主语或宾语如1.In an hour,we can travel to places_____would have taken our ancestors days to re ach.A.whereB.whenC.whichD.what2.This is the town_____I wanted to visit most.A.whereB.whenC.thatD.what3.This is the town_____I was born.A.whereB.whenC.whichD.what4.I’ve never been to Beijing,but its the place____.A.where I’d like to visitB.in which I’d like to visitC.I most want to visitD.that I want to visit it most（3）why指原因，其先行词是原因，起原因状语作用。
它的先行词只有reason。
例如：Nobody knows the reason why he is often late for school. 没人知道他为什么上学总迟到。
1这三个关系副词在意义上都相当于一定的介词+which结构：when=on(in,at,during......)+which;where=in (at,o......)+which;why=for which.例如：I was in Beijing on the day when(=on which)he arrived.The office where(=in which)he works is on the third floor.This is the chief reason why(=for which)we did it.练习题I.单项填空1.-Do you know the man ______is talking with your father？-Yes，he‘s our headmaster.A. heB.whoC. whichD. whom2. Is this the river _____I can swim？A. whichB. in whichC. thatD. the one3.This is the best hotel in the city _____I know.A. whereB. whichC. thatD. it4. Can you lend me the dictionary ______the other day？A. that you boughtB. you bought itC. that you bought itD. which you bought it5.Anyone ______with what I said may put up you hands.A. which agreesB. who agreeC. who agreesD. which agree6. My watch is not the only thing ______ is missing.A. thatB. itC. which who7. The man ______coat is black is waiting at the gateA. who‘sB. whoseC. that of which.8. The girl ______ is reading under the tree _____my sister.A. which；isB. whom；wasC. who；isD. who；was9. I love places ______the people are really friendly.A. thatB. whichC. whereD. who10. The world ______ is made up of matter.A. in that we liveB. on which we liveC. where we live inD. we live inⅡ、用适当的关系代词that，which，who，whom填空。
1. The first thing ______you must do is to have a meal.2. April 1st is the day _____is called April Fool’s Day in the west.3. The family _____had lost everything in a big fire got much help from their friends.4. The house _____we live in is very old.5. Didn’t you see the man ______I talked with just now？Ⅲ、根据句意，在横线处填上恰当的关系代词。
1. Who drew the picture ________ is worth 60,000 yuan?2. The man ________ is wearing a blue T-shirt is good at skating.3. This is a store ________ sells all kinds of school things.4. The woman ________ you talked to just now is our English teacher.5. The town ________ we visited last time is much larger than before.6. We saw the tree ________ was five hundred years old.7. The computer ________ my father bought for me works well.8. He is the boy ________ I saw in front of the library.。