定语从句讲解一． 基本介绍 ❶功能：相当于adj,修饰名词或代词，在句中作定语 ❷位置：被修饰词之后 ❸先行词：被定语从句修饰的词关系词用法成份例句关系代词that人、物主、宾Is he the man that wants to see you?who人主Is he the man who wants to see you?whom谁+N主、宾He is the man whom I saw yesterday?whose谁的+N定语Please pass me the book whose cover is green.which哪个、物主、宾This is the house which we bought last month.as正主、宾、表As we all know,smoking is harmful to one’s health.关系副词when什么时候介词+whichThere are occasions when(on which)are must yield.where地点哪里Beijing is the place where(in which) I was born.why表原因Is this the reason why(for which) he refused our offer? ❹关系词：连接先行词与从句的词称为关系词。
❺确定关系词的步骤：先看先行词，指的是什么；看关系词在充当的成份二．特殊用法 1情况用法先行词只用that,不用which,指物宜用which，不用thatas/which的区别❶先行词是序数词或形容词最高级时关系词前有介词 只用as:先行词被such和the same修饰，或句型as many(much)中无先行词的定语从句中用as/which引导❷先行词被all/every/no/some/any/little/much/the only/the very/few等词修饰时引导非限制性定语（有逗号隔开的句子）从句as:“正如.....一样”，可置句首也可在另处❸先行词既有人又有物时先行词本身是that❹先行词在主句中做表语❺主句是以which开头的特殊疑问句时which只能放句中❻先行词为all/much/little/none/few/something/anything等不定代词 1.He was looking pleasantly at the children and parcels______filled his bus. 2.The village is no longer the one ___it was five years ago. 5.Such books____you bought are useful. 3.Which are the books____you bought for me? 6.____ is known,the earth is round. 4.There is a room,_____window faces the river. 7.There is lots of air in loose snow,_____can keep the cold out.高中定语从句练习（整理）1. They talked for about an hour of things and persons _____ they remembered in the factory.A. which B. that C. who D. whom2. We are going to spend this Spring Festival in Beijing, _____ live our grandparents and some relatives.A. which B. that C. who D. where3. There are many areas in the world _____ lack experienced doctors.A. where B. in which C. which D. what4. The years and months _____ we spent together are really wonderful to us all.A. when B. on which C. in which D. that5. _____ has been described above, it is a general rule that solids expand as the temperature increases and contract when they are cooled.A. It B. As C. That D. Which6. A. who’s B. which C. whose7. Susan is not the brilliant writer _____ she used to be. D. thisA. which B. that C. who D. whom8. I, who _____ your friend, will try my best to help you.A. be B. am C. are D. is9. The size of the audience, _____ we had expected, was well over 1600.A. as B. that C. which D. who10. They have started an investigation, _____ are being kept secret.A. whose detail B. whose the detailsC. the details of which D. the detail of it11. Have you ever asked him the reason _____ may explain his absence?A. why B. for which C. which D. what12. There were two rooms in the beach house, _____ served as a kitchen.A. the smaller of them B. the smallest of whichC. the smaller of which D. smallest of which13. He imagined various ways _____ he could teach her how to learn English well.A. / B. that C. in which D. A , B & C14. The speed _____ light travels is said to be the maximum in the universe.A. in which B. by which C. at which D. from which15. Can you think out a situation _____ this idiom can be used?A. in which B. that C. where D. A & C16. China has hundreds of islands, _____ is Taiwan.A. in which the largest B. its largest of whichC. of which the largest D. which the largest17. We ate in a luxurious restaurant but it wasn’t such a good dinner _____ she had promised us.A. that B. which C. as D. what18. They stayed with me for three weeks, _____ they drank all the wine I had.A. which B. which time C. during which D. during which time19. She was dressed in the same way _____ she was when I saw her last time.A. that B. as C. once D. in which20. The fire started on the first floor of the hospital, _____ patients are mostly elderly people.A. its B. which C. whose D. their21. The company official _____ I thought would be fired received a raise.A. whom B. whoever C. who D. of whom22. Alec asked the policeman _____ he worked to contact him whenever there was an accident.A. with him B. who C. whom D. with whom23. We are living in an age _____ many things are done on computer.A. at which B. that C. when D. which24. The factory produces half a million pairs of shoes every year, 80% _____ are sold abroad.A. which B. which of C. of which D. of that25. The road conditions there turned out to be very good, _____ was more than we could expect.A. it B. which C. what D. that26. He’s such a good teacher _____ we all love and respect.A. that B. as C who D. whom27. Today, more and more people are concerned about the way _____ the environment is being destroyed.A. which B. in that C. in which D. how28. The old man finally got a chance to visit the school, _____ he used to study, _____ he had beendreaming of。