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English Grammar ( The Fourth Lesson)
定 语 从 句 （一）关于which和that 1. A plane is a machine that can fly. 2. You must do everything (that) I do. 3.The building（which） we are looking at used to be a hospital. 4.Is this the school（which ）you visited last Sunday?
总结：上述句子都有一个主句和一个从句组成。并且从句都是来修饰它前面的一个名词或代词。因此，在复合句中，修饰名词或代词的从句叫做定语从句。
要点：?被定语从句修饰的词叫 ：先行词 ?先行词后的划线部分叫：定语从句 ? 引导从句的词叫： 关系代词
当被修饰的词是物时，关系代词用which或 that，当关系词在定语从句中作宾语时，可以省略。 即学即练：
1.The noodles (我煮的） were delicious.(cook)
2.The fish (我们今早买的）were not fresh.(buy)
3.The building (正在建造的）is intended for the teachers.(build)
4..The earthquake (你们刚刚谈到的）sounded frightening/shocking.(talk)
（二）关于who和whom
1.The foreigners who visited our class yesterday is from Canada. 2.The boy who broke the window is called Tom. 3.The person to whom you just talked is Mr Li. 4.Mrs Read is the person to whom you should write. 总结: 当现行词是人时，关系代词用who或whom，且关系词在定语从句中作宾语时，可以省略。
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即学即练：
5.He is one of the tourists （去过伦敦的）.
6.Those （被困在···的）under the ruins finally got rescued.（trap）
7.The man (正与我聊天的）on line is Tony.(with)
8.My family, (他们全都是音乐爱好者）, are going to the movie tonight.（all）
（三）关于whose
1.This is the scientist whose name is known all over the world. 2.I went to see my friend the Smiths, whose children I used to looked after when they were very small. 3.He has written a book whose name I’ve forgotten. 4.The room whose window faces South is mine. 总结：wh