定语从句初中教学课件

时间:2021-08-31

  定语从句初中教学课件

  在复合句中,修饰名词或代词的从句叫定语从句,被修饰的名词或代词叫先行词,引导定语从句的有关系代词 who, whom, whose, which, that等和关系副词where, when, why等 ,关系代词和关系副词在定语从句中担任句子成份。

  1.由who引导的定语从句中 ,who用作主语,如 : This is the boy who often helps me.

  2.由whom引导的定语从句中,whom用作宾语,如:The man whom you are waiting for has gone home.

  3.由whose引导的定语从句中 ,whose用作定语,如 : Do you know the girl whose skirt is white?

  4.由which引导的定语从句中,which用作主语或谓语动词的宾语或介词的宾语,如:

  The room in which there is a machine is a work shop.

  The river which is in front of my house is very clean.

  This is the pen which you want.

  注意 :

  (1)whom, which用作介词宾语时,介词可放在 whom、which之前,也可放在从句原来的位置上;但在含有介词的动词固定词组中,介词只能放在原来的位置上。如: He is the very person whom we must take good care of.

  (2)引导非限制性定语从句时,必须用关系代词which,不用that,如:I have lost

  my bag, which I like very much.

  (3)关系代词在句中作主语时,从句的谓语动词的人称和数必须和先行词保持一致。

  5.由that引导的定语从句中,that可以指人或物,在从句中作主语或谓语动词的宾语,但不能放在介词后面作介词宾语,如:

  The book that I bought yesterday was written by Lu Xun.

  注意在下面几种情况下必须用 that引导定语从句。

  (1)先行词是不定代词all, few, little, much, something, nothing, anything等,如 :

  All that we have to do is to practise English.