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1、.定语从句知识点讲解一一、定语从句的概念 在复合句中，修饰某一名词或代词的从句叫定语从句。被修饰的名词或代词叫先行词，定语从句一般放在先行词的后面。二、定语从句的关系词引导定语从句的关系词有关系代词和关系副词，常见的关系代词包括that， which， who（宾格whom，所有格whose）等，关系副词包括where， when， why等。关系代词和关系副词放在先行词及定语从句之间起连接作用，同时又作定语从句的重要成分。三、定语从句的分类根据定语从句与先行词的关系，定语从句可分为限制性定语从句及非限制性定语从句。限制性定语从句紧跟先行词，主句与从句不用逗号分开，从句不可省去，非限制性定语从
2、句主句与从句之间有逗号分开，起补充说明作用，如省去，意思仍完整。四、关系代词的用法1. that 既可以用于指人，也可以用于指物。在从句中作主语或宾语，作主语时不可省略，作宾语可省略。例如：Mary likes music that is quiet and gentle.玛丽喜欢轻柔的音乐。（that作主语）The coat （that） I put on the desk is blue.我放在桌子上的那件外套是蓝色的。（that作宾语）2.which用于指物，在句中作主语或宾语，作主语不可省略，作宾语可省略。例如：The building which stands near the tr
3、ain station is a supermarket.位于火车站附近的那座大楼是一家超市。（作主语）The film （which） we saw last night was wonderful. 我们昨天晚上看的那部电影很好看。（作宾语）3.who， whom用于指人，who 用作主语，whom用作宾语。在口语中，有时可用who代替whom， 也可省略。例如：The girl who often helps me with my English is from England.经常在英语方面帮助我的那个女孩是英国人。（作主语）Who is the teacher （whom） Li M
4、ing is talking to？ 正在与李明谈话的老师是谁？（作宾语）注意：（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 per
5、son 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， m
6、any， 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：
7、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
8、that 的情况：a.先行词为that， those时，用which， 而不用that.例如：Whats 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。例如：Thi
9、s 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。例如：This is the place where he works.这是他工作的地点。（3）why 指原因，其先行词是原因，起原因状语作用。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。六限制性定语从句1. 限制性定语是指定语从句紧跟它所修饰的中心名词或代词之后，没有逗号分开。2. 引导词：分为关系代词和关系副词。（1） 关系代词引导的定语从句：tha
10、t:指代人、事物，作主语、宾语，做宾语时可以省略who:指代人，做主语whom:指代人，做宾语，可以省略。它在口语和非正式用语中常用who代替，可以省略The man whowhom you met just now is my brother.which:指代事物，做主语、宾语。做宾语可以省略whose:指代人、物，做定语，其后直接加名词He has a friend whose father is a doctor.The classroom whose door is broken will soon be repaired.指物时常用以下结构代替：The classroom whose
11、 door is broken will soon be repaired. The classroom the door of which is broken will soon be repaired（2） 关系副词引导的定语从句：where：指地点，在定语从句中做地点状语Shai hai is the city where I was bornThe house where I live ten years ago has been pulled downwhen: 指时间，在定语从句中做时间状语I still remember the day when I first came to
12、the schoolwhy: 指原因，在定语从句中做原因状语Please tell me the reason why you missed the plane注意:关系副词引导的定语从句都可以用“介词+关系代词”引导的定语从句来代替Shai hai is the city wherein which I was bornI still remember the day whenon which I first came to the schoolPlease tell me the reason why for which you missed the plane3. 注意(1) 限制性定语
13、从句中只能用that的几种情况：A 当先行词是anything, everything, nothing (something 除外), few, all, none, little, some等代词时，或者是由every, any, all, some, no, little, few, much等代词修饰时 ，要用that Have you taken down everything that Mr. Li has said?There seems to be nothing that seems impossible for him in the world.All that can b
14、e done has been done. B 当先行词是序数词或被序数词修饰,如：firstlastnext等 The first place that they visited in London was the Big Ben. C 当先行词是形容词最高级或被形容词最高级修饰时 This is the best film that I have seen. D 当形容词被the very, the only 修饰时 This is the very dictionary that I want to buy, After the fire in his house, the old ca
15、r is the only thing that he owned. E 当先行词前面有who, which等疑问代词时 Who is the man that is standing there? Which is the T-shirt that fits me most? F 当先行词既有人，也有动物或者物体时 Can you remember the scientist and his theory that we have learned? (3) 以the way为先行词的定语从句通常由in which, that引导，而且通常可以省略。 The way in which/ that/./ he answered the question was surprising练习1. All these activities can serve as a platform _ you might find the one you love. A. which B. that C. where D. when2. As a teacher, I seldom give my students so difficult a problem _ they cannot wor
