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1、高中英语语法定语从句全套定语从句（Attributive Clauses）在句中做定语，修饰一个名词或代词，有时也可以修饰部分或整个句子。被修饰的名词，词组或代词即先行词。定语从句通常出现在先行词之后，由关系词（关系代词或关系副词）引出。关系代词有：who, whom, whose, that, which, as。关系副词有：when, where, why, how。关系代词和关系副词放在先行词和定语从句之间，起连接作用，同时又可做定语从句的一个成分。当关系代词做宾语时可以省略。定语从句中的谓语动词必须在人称上和数量上和先行词保持一致。定语从句分为限制性定语从句和非限制性定语从句。1 、关
2、系代词引导的定语从句1) who, whom, that 这些词代替的先行词是人的名词或代词，在从句中所起作用如下：Is he the man who/that wants to see you?（who/that在从句中作主语）He is the man whom/ that I saw yesterday.（whom/that在从句中作宾语）2) whose 用来指人或物，（只用作定语，若指物，它还可以同of which互换），例如：Please pass me the book whose (of which) cover is green.3) which, that 它们所代替的先行
3、词是事物的名词或代词，在从句中可作主语、宾语等，例如：A prosperity which / that had never been seen before appears in the countryside.（which / that在句中作宾语）The package (which / that) you are carrying is about to come unwrapped. (which / that在句中作宾语)关系代词that和which 都可以指物，that 和Who 都可以指人，其用法区别：不用that的情况：a) 在引导非限定性定语从句时(错)The tree,
4、that is four hundred years old, is very famous here.b) 介词后不能用We depend on the land from which we get our food.c) 多用who 的情况关系代词在从句中做主语A friend who helps you in time of need is a real friend.先行词为those, people 时Those who were either fools or unfit for their offices could not see the cloth.先行词为all, anyo
5、ne, ones, one 指人时One who doesnt work hard will never succeed in his work.在There be句型中There is a stranger who wants to see you.在被分隔的定语从句中A new teacher will come tomorrow who will teach you German.在有两个定语从句的句子中，其一用who，其二用that,但若先行词后接两个以上的并列定语从句时，后一个必须重复前一个关系代词。The student who was praised at the meeting
6、 is the monitor that is very modest and studies very hard.There is a teacher who is always ready to help others and who enjoys what he does.2) 只能用that作为定语从句的关系代词的情况a)在不定代词，如：anything, nothing, everything, all, much, few, any, little等作先行词时，只用that，不用which。All that is needed is a supply of oil.Finally,
7、 the thief handed everything that he had stolen to the police.b)先行词有the only, the very, the just修饰时，只用that。He is the very man that helped the girl out of the water.c)先行词为序数词(the last)、数词、形容词最高级时，只用that。The first English book that I read was The Prince and the Pauper by Mark Twin.d)先行词既有人，又有物时。He tal
8、ked about the teachers and schools that he visited.e)当主句是以who 或which 开始的特殊疑问句时，用that 以避免重复。Who is the person that is standing at the gate.f)关系代词在从句中做表语He is not the man that he used to be.2 、关系副词引导的定语从句关系副词可代替的先行词是时间、地点、方式或理由的名词，在从句中作状语。关系副词when, where, why, how的含义相当于介词+ which结构，因此常常和介词+ which结构交替使用
9、，例如：There are occasions when (on which) one must yield.Beijing is the place where (in which) I was born.Is this the reason why (for which) he refused our offer?Im surprised the way how (by which) he works out the problem.注意：在非限制性定语从句中，介词+ which结构不能代替关系副词。如：They set up a state for their own , where t
10、hey would be free to keep Negroes as slaves.含有介词短语的动词一般不能拆开，介词仍放在动词后面。Is this the book which (that) she was looking for?3、名词/数词/代词 /形容词最高级 + 介词 + 关系代词引导定语从句She has written a book , the name of which I have forgotten.There are fifty-five students in our class , all of whom are working hard.There are
11、five continents in the world , the largest of which is Asia.4、as, which 引导非限定性定语从句的差别由as, which 引导的非限定性定语从句，as和which可代整个主句，相当于and this或and that。As一般放在句首，which在句中。As we know, smoking is harmful to ones health.The sun heats the earth, which is very important to us.as可引导非限制性从句，常带有“正如”的意思。As is know, sm
12、oking is harmful to ones health.用法区别：(1) as 引导的定语从句可置于句首，而which不可。As we all know, he never smokes.(2) as 代表前面的整个主句并在从句中作主语时，从句中的谓语必须是系动词；若为行为动词，则从句中的关系代词只能用which。(3)非限定性定语从句中出现expect, think, suppose 等表示猜测、想象、预料等时。She succeeded in her doing the research work , as we expected.(4)As 的用法 the same as; su
13、chas 中的as 是一种固定结构, 和一样。I should like to use the same tool as is used here.We should have such a dictionary as he is using.定语从句语法专项练习习题精选用适当的关系词填空：1. I still remember the night _I first came to the house.2. Ill never forget the day_ we met each other last week.3. Mr Black is going to Beijing in Octob
14、er, _is the best season there.4. I will never forget the days _I spent with your family.5. Ill never forget the last day_ we spent together.6. This is the school _I used to study.7. Do you still remember the place_ we visited last week?8. Do you still remember the place_ we visited the painting exhi
15、bition?9. Have you ever been to Hangzhou,_is famous for the West Lake?10. Have you ever bee to Hangzhou, _lies the West Lake?11. Tom will go to Shanghai,_live his two brothers.12. I live in Beijing,_is the capital of China.13. There was a time _there were slaves in the USA.14. It is the third time _you have made the same mistake.15. It was in the street _I met John yesterday.16. It was about 600 years ago_the first clock with a face and an hour hand was made.17. The moment _
