定语从句专项练习概念:1.在句子中修饰名词或代词，定语从句在句中充当定语。
2.定语从句必须有先行词，并尽量靠近先行词。
3.在定语从句中，关系词在从句中充当成分。
关系代词与关系副词关系代词：指人： who(主格)， whom(宾格)，whose(所有格)指物： which(主格，宾格)， whose(所有格)指人或物： that关系副词： when, where, why1. This is all ____I know about the matter.A. thatB. whatC. whoD. whether2. Is there anything else _____ you require?A. whichB. thatC. whoD. what3. The last place _____we visited was the Great Wall.A. whichB. thatC. whereD. it4. He talked happily about the men and books_____ interested him greatly in the school.A. whichB. thatC. itD. whom5. There is no dictionary _____ you can find everything.A. thatB. whichC. whereD. in that6. This is one of the best books_______.A. that have ever been written C. that has writtenB. that has ever been written D. that have written7. He wrote a letter to me, telling me everything _______he saw on the way to the Paris.A. whatB. thatC. whichD. where8. Is oxygen the only gas _____helps fire burn?A. thatB. /C. whichD. it9. Is there anything _____to you?A. that is belongedB. that belongsC. which belongsD. that belong10. The scientist and his achievements ______ you told me about are admired by us all.A. whichB. thatC. whoD. whose11. Which of the books ______were borrowed from him is the best?A. whichB. whatC. thatD. whose结论：先行词有下列情况或附有下列修饰语时, 通常关系代词that1)先行词是all， no， none， everyone， something， much， little等。
2)先行词前有序数词,形容词最高级，the last， the same， the only等。
3)如果先行词中既含有表示人的名词又有表示物的名词时。
4)若主句中有疑问代词who，which 为了避免重复, 关系代词不要再用who， which。
1. Do you know who lives in the building ______there is a well?A. in front of itB. in front of whoseC. in front of whichD. in front which2. I’ll never forget the day ____I joined the League.A. on whichB. in whichC. whichD. at which3. The woman _____my brother spoke just now is my teacher.A. whoB. to whomC. to who D whom4. Jeanne was her old friend, ____she borrowed a necklace.A. from whoB. from whomC. to thatD. to whom5. His glasses, _____he was like a blind man, fell to the ground and broke its leg.A. whichB. with whichC. without whichD. that6. she is a teacher of much knowledge, _____much can be learned.A. whoB. thatC. from whichD. from whom7. He built a telescope _____he could study the skies.A. in whichB. with thatC. through whichD. by it8. Do you know the reason ____he was late?A. thatB. whichC. for whatD. for which9. I have bought two ball pens, ____writes well.A. none of whichB. neither of whichC. none of themD. neither of them10. The Second World War _____millions of people were killed in 1945.A. during whichB. in thatC. whereD. on which11. China has many rivers,_ ___the Changjiang River is the longest.A. whichB. in whichC. among whichD. one of which12. This is the very knife _____I used to cut apples yesterday.A. thatB. by whichC. whichD. with which结论：介词﹢关系代词引导的定语从句，关键是判断介词的选择，方法一是看从句谓语部分缺少什么介词(习惯搭配)，再则可以通过整个句子整体含义来判断，结合生活实际来判断。
1.______was natural, he married Jenny.A. WhichB. ThatC. ThisD. As2. Such signs _____we use in the experiment______ Greek letters.A. as , areB. as, isC. that, areD. that, is3. I passed him a large glass of whisky, _____ he drank immediately .A. thatB. asC. whichD. who4. She is very good at dance, ____everybody knows.A. thatB. whichC. whoD. as5. It was raining, _____was a pity.A. whatB. thatC. the whichD. which6.______has been said above, grammar is a set of dead rules.A. WhichB. WhatC. ThatD. As7. We do the same work _____they do.A. whichB. asC. thanD. like8. The earth is round, _____we all know.A. thatB. whichC. whoD. as结论： as ,which均可以引出非限制性定语从句，,如都指前一句话的意思，二者可以互换。
.as 引导的从句可以放在句首，as 本身有“正如…..正象…”一类的含义。
与之连用的词有know， see， expect， announce， point out等。
此外，在the same…as…， such….as….中as引导的是限制性定语从句。
1. A. Is this the factory _____you visited last year?B. Is this factory ____you visited last year?a. thatb. wherec. in whichd. the one2. A. Mr Smith is one of those foreigners who____ working in China.B. Mr Smith is the only one of those foreigners who ____working in China.a. isb. hasc. haved. are3. A. Don’t discuss quest ions such _____those.B. Let’s discuss only the questions______ we are interested in.a. whichb. thatc. asd. about which4. A. All ____I need is a good rest.B. ____I need is a good rest.a. Whatb. All whatc. thatd. Which5. A.Pisa is a city, ___ has a leaning tower.B. Pisa is a city, ____there is a leaning tower.a. whichb. thatc. whered. there6. A.This is the place ____we visited last year.B. This the place ____we worked last year.a. whichb. wherec. in thatd. there7. A.The news ____he told us was very exciting.B. He has brought us the news ____our team has won the game.a. whatb. asc. thatd. where8. It is in a box ____I have hidden my money. We’ll go ___we are needed.a. that b .in which c. where d. in it结论：在实践中要注意定语从句与其它从句的结构上的细微差别，能够正确区分使用它们。