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1、主题： 定语从句知识讲解定语从句何时用that,何时用which,何时用where,when,what…内容： 定语从句何时用that,何时用which,何时用where,when,what…主题： 定语从句内容： 定语从句 定语从句（Attributive Clauses）在句中做定语，修饰一个名词或代词，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等。关系副词有：when, where
2、, why等。一、关系代词引导的定语从句 关系代词所代替的先行词是人或物的名词或代词，并在句中充当主语、宾语、定语等成分。关系代词在定语从句中作主语时，从句谓语动词的人称和数要和先行词保持一致。 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? 他就是你想见的人吗？（who/that在从句中作主语） He is the man whom/ that I saw yesterday.他就是我
3、昨天见的那个人。（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： They rushed over to help the man whose car had broken down. 那人车坏了，大家都跑过去帮忙。 Please pass me the book whose (of which) cover is green. 请递给我那本绿皮的书。 3）which, that 它们所代替的先行词是事物的名词或代词，在从句中可
4、作主语、宾语等，例如：A prosperity which / that had never been seen before appears in the countryside. 农村出现了前所未有的繁荣。（which / that在句中作宾语） The package (which / that) you are carrying is about to come unwrapped. 你拿的包快散了。(which / that在句中作宾语) 二、关系代词that, which的用法A. 以下情况多用that. (1
5、) 如果先行词是all, much, anything, something, nothing, everything, little, none等不定代词，关系代词一般只用that，不用which。例如：All the people that are present burst into tears. Is there anything that I can do for you?(2) 如果先行词被the only, the very, the same, the last, the best等词修饰，关系代词常用that(
6、指人时，可以用who),例如：This is the very book that I want to find.That is the best film that we have seen.I was the only person in my office that/who was invited. (3) 当先行词被all, every, no, some, any, little, much所修饰时；You can take any seat that is free.(4) 当先行词被序数词或形容词最高级所修饰时。It
7、is the first foreign book that I have ever seen.This is the most beautiful flower that I have seen.(5) 在there be句型中，常用that.There is a man that lives in that village.(6) 先行词有两个，一个指人，一个指物，关系代词应该用that。例如： The boy and the dog that are in the picture are very lovely.B. 以下
8、情况用which.(1) 当关系词前面有介词时，指物常用which.The prize for which he worked so hard was a new bike.He built a telescope
