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1、Unit 6 I like music that I can dance to.-定语从句I have a ruler.A ruler is long.I have a ruler that is long.先行词定语从句Mary is a girl.Mary has long hair.Mary is a girl who has long hair先行词定语从句定语从句1.概念在复合句中，修饰某一名词或代词的从句 叫做定语从句。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。2. 合并和拆分练习引导定语从句的词引导定语从句的词有关系代词和关系副词 。 常见的关系代词：that,
2、which,who(宾格 whom,所有格whose)等。 常见的关系副词：where, when,why等。关系代词或关系副词放在先行词及定语从 句之间起连接作用，同时做定语从句的重 要成分。关系代词的用法 (that/which/who/whom/whose)that 既可指人，也可指物。从句中做主语 或宾语。做主语是不可省略，做宾语时一 般可以省略。 e.g. Mary likes music that is quite and gentle.(做主语) Mary likes music that she can dance to. (作宾语)定语从句1.概念在复合句中，修饰某一名词或代
3、词的从句 叫做定语从句。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。2. 合并和拆分练习which 指物，从句中做主语或宾语，做主 语时不能省略，作宾语可省略。 e.g. The film which will be shown tommorrow is wonderful.(做主语) The film (which) we saw last night was wonderful.( 作宾语)who 指人，在从句中做主语 whom 指人，在从句中做宾语 whose 在从句中做定语（表示所属关系）e.g.The girl who often helps me is from E
4、ngland.(做主语) The woman whom they wanted to visit is a teacher.(作宾语) The girl whose mother is a doctor is Mary.(作定语)关系词只能用that的情况：1.先行词被序数词、adj.最高级所修饰，或者先行词本身就 是序数词或者adj。最高级形式。例：He was the first person that passed the exam.他是第一个通过考试的人。Mary is the most beautiful girl that I have ever known.玛丽是我见过的最漂亮的
5、女孩。序数词形容词最高级2.被修饰的先行词为all, any, much, everything, anything, none, the one等不定代词时。例：Is there anything that you want to buy in the shop? 你在商店里有什么东西要买吗？3.先行词被the very, the same, the last,little,few等 词修饰时。 例：This is the same bike that I lost.这就是我丢的那辆自行车。This is the very book that I want to read.这正是我想读的那本
6、书。4.先行词里同时含有人或物时。例：These are the persons and things that I saw on the way.这些就是我在路上所见的人和事。I know nothing about the doctors and hospitals that you are talking about.我不了解你所谈到的那些医生和医院。5.以Who,which引导的特殊疑问句，为避免重复，只能用 that。例：Who is the girl that is crying?正在哭泣的女孩是谁？Which is the car that killed the man?撞死那个男子的车是哪一辆？6.主句是there be结构，修饰主语的定语从句用that，而不 用which。例：There is a book on the desk that belongs to Tom.桌子上的那本书是汤姆的关系词只能用which的情况：1.先行词为that,those时例：Whats that which is under the desk?2.关系代词前有介词时例：This is the room in which he lives.3.引导非限制性定语从句
