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1、Book1 Unit4 定语从句【学习目标】：了解定语从句的概念，掌握关系代词的用法。【学习重点】：关系代词的作用及在从句中充当的成分。 【学习难点】：如何选择正确的关系代词进行表达。课堂探究： 一、定语从句的有关概念： 1.在复合句中，修饰某一名词或代词的句子叫做定语从句。如：划线部分l) The man wholives next to us is a policeman. n.2) You must do everythingthat I do.Pron限定性定语从句一一先行词和关系词之间不用逗号隔开eg:1) 2) 非限定性定语从句先行词和关系词之间有逗号隔开 eg: I went t
2、o see my friends the Smiths, whose children I used to look after when they were small.2先行词：被定语从句修饰的对象。eg： 上面两句中的man和everything，定语 从句放在先行词后面。3.关系词：引导定语从句，代替先行词在其引导的定语从句中充当一定的句子成 分。引导定语从句的关系词有: 关系代词：%关系副词： 二、关系代词的用法1) that 既指，又指，在从句当中作或A. This is the book that I want to read.B. Tom is the only one of
3、the guests that comes from the USA.2) which 指，在从句中作或。A. The letter which I received yesterday was from my father.B. The dog which was lost has been found.3) who 指，在从句中作或。A. Here comes the girl who wants to see you.B. Mr. Li is a man who we should learn from.4) whom 指，在从句中作。A. Do you know the woman w
4、hom he is talking to?B. Rose is the person whom you should look after.5) whose 既指又指，在从句表示。A. I know the person whose company produces computers. B. This is the book whose cover is blue.This is the book of which the cover is blue. 指物时可与 of which 互换使用归纳：1. 先行词指人时，用关系代词 that / who （whom）, 在句中作主语/（宾语） ；
5、2. 先行词是物时，用关系代词that / which，在从句中作主语/宾语；3. 表人或物的所有关系，用whose，既指某（些）人的”；“某物的”。提醒一：一般说来，除了用定语从句解释名词或泛指外，先行词前应有定冠词 the。提醒二：关系代词在从句中作主语时，先行词的单复数决定从句谓语动词的单复 数。用 be 的恰当形式填空。 These are the trees whichplanted last year. （ 先行词） This is the tree whichplanted last year. （ 为先行词）提醒三：关系代词的省略：1）在限制性定语从句中，关系代词 which,
6、 whom, that 作动词宾语或介词宾语（此 时介词不能在关系代词前）时常可省略，eg: The man （whom/who/that） I talked to just now is Mr. Li. 指人用 whom/who/that 做宾语 可省略The man to whom I talked just now is Mr. Li.介词提前不能省略2）在非限制性定语从句中whom, who, which不能省略。Our guide, who was a French.提醒四：在限制性定语从句中，以下情况一般只用that引导。1）当先行词为 all, everything, nothi
7、ng, anything, little, much 等不定代词；先行词 被这些词修饰时。eg： All that can be done has been done.。2）先行词被形容词最高级或序数词修饰时。eg： This is the largest ship that I have ever seen.3）当先行词被 the only, the very, the last 修饰时。eg： This is the very book that I am looking for.4）当先行词既指人又指物时。eg： We often talk about the persons and things that we remember.5）当先行词不论人或物在定语从句中作表语时。eg： Shanghai is no longer the city that it used to be.
