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1、定语从句中的that和which的区别：that和which在从句里都可以做宾语和主语，做宾语时可以省略。在定语从句中,有种说法叫关宾省,意思是关系代词在限制性定语从句中作宾语可以省略,不管是that，which，还是whom。但是which能引导非限制性定语从句，that则不行。 只能用that的几种情况：1. 当先行词为all, much, little, none及由any, every, some, no所构成的复合不定代词时。We should do all that is useful to the people. Please tell me anything that you
2、know about the matter. 2. 当先行词被any, few, little, no, all, much, some等词修饰时。You can take any seat that is free. There is little work that is fit for you. 3. 当先行词为序数词或被序数词所修饰时。When people talk about the cities of China, the first that comes to my mind is Beijing. This is the fourth film that has been s
3、hown in our school this term. 4. 当先行词为形容词最高级或被形容词最高级修饰时。The best that I could do was to apologize. This is the most interesting story book that I have ever read. 5. 当先行词被the very, the only, the last, the just, the same等修饰时。This is the very book that Im looking for. The only thing that we could do wa
4、s to wait. 注意：先行词被the same修饰时，关系代词也可用as。I need the same book that / as you have. 6. 当先行词既包含人又包含物时。They are talking of the heroines and their deeds that interest them. 7. 当先行词是疑问代词who，which，what或主句以这些词开头时。Who that has ever worked together with him doesnt admire him? Which is the star that is nearer t
5、o the earth？ 8. 当先行词为主句表语或关系代词为从句表语时。Thats a good book that will help you a lot. Our school is no longer the place that it used to be. 9. 先行词为time时，当time表示次数，引导词用that, 可省略。 当表示时间，可用that或when引导，都可省略。I do remember the first time(that) I had ever heard the sweetest voice in the world.I didt remember th
6、e exact time （when/that） I arrived in Shanghai last month. 只能使用which的情况:1. 在“介词关系代词”结构中，关系代词必须用which。The house in which we live is very large. This is the reference book（参考书） of which the teacher is speaking. 注意： 如果介词不放在修饰事物的限定性定语从句的句首， which就可换为that。 This is the question which/that weve had so much
7、 discussion about. =This is the question about which weve had so much discussion. 2. 先行词为“those表事物的复数名词”时， 关系代词通常只用which而不用that。You should grasp well those skills which may be used in the future work.特殊情况：当先行词是表示原因或方式的名词时，可以用that引导定语从句，相当于介词+which，that可以省略。She likes the child for the very reason that (=for which) she loves his father. He didnt like the way that (=in which) she speaks to his mother. Imagine the speed that (=at which) he drives the car. The reason (that /for which /why) he came here was to ask for our help.