Unit 6 Using language“介词关系代词”引导的定语从句关系代词前介词的选用（ppt课件） -2022新外研版（2019）《高中英语》必修第一册.pptx

1、Unit 6 At one with nature 定语从句(3)“介词，关系代词”引导的定语从句，“介词的选用”1、定语从句的概念概念:在复合句中修饰名词或代词的句子叫作定语从句。定语：修饰，限定名词或代词的成分，翻译为“的”常见作定语的词：名词，代词，形容词，数词，介词短语等。eg.Mary is a beautiful gir.（形容词作定语）Mary is a girl with long hair.（介词短语做后置定语）Mary is a girl who has long hair.（句子作定语,修饰girl,叫做定语从句）2、定语从句的结构Mary is a girl who h

2、as long hair.先行词关系词定语从句关系代词关系副词hat,who,whom,whose,which where,when,why从句的谓语和先行词保持一致被从句修饰的名词或代词-关系词作用：引导定语从句，代替先行词在定语从句中充当主语，宾语，定语等成分，作宾语时常被省略。3、“介词，关系代词”的用法用法:在“介词，关系代词”引导的定语从句中，关系代词只能用whom或which，不能用that。eg.Do you remember the day on which you joined our club.还记得你加入我们俱乐部的那一天吗？In the dark street，ther

3、e wasnt a single person to whom she could turn for help.在漆黑的大街上没有一个人能为她提供帮助。4、关系代词前介词的选用1）先看先行词、从先行词入手。介词往往和先行词构成固定搭配。(比如先行词表示时间,常和on、in、by搭配；表示地点，常与on、in、at搭配；表示原因，与for搭配；表示方式，常与in、by、with搭配。2）看从句中的谓语动词。根据从句中谓语动词介词的固定搭配选择合适的介词。4、关系代词前介词的选用3）表示“整体中的部分”或“所有关系”时，用介词of。He paid the boy$10 for washing te

4、n windows，most of which hadnt been cleaned for at least a year.他付了10美元给这个男孩清洗10个窗户，大部分窗户已至少一年没有擦了。He has three uncles，all of whom are doctors.他有三个叔叔，他们全都是大夫。注意：含有介词短语的动词一般不拆开，介词仍放在动词的后面，因此不能使用“介词关系代词“的结构。Is this the watch which he was looking for？(不能说：Is this the watch for which he was looking？)这是他正

5、在找的那块手表吗？This is the baby(whom/that)my grandma takes care of.(不能说：This is the baby of whom my grandma takes care.)这就是我奶奶照看的婴儿。eg.This is the house in which the inventor lived.这就是那位发明家住过的房子。He is a person of whom everyone has heard.他是一个大家都听说过的人。He has a book in his hand the cover of which is missing.

6、他的手里拿了一本缺了封面的书。eg.There are sixty students in our class,twenty of who are girls.我们班有六十名学生,其中二十名是女生。The factory produces half a million pairs of shoes every year,80%of which are sold abroad.这家工厂每年生产50万双鞋子、其中的80%销往国外。There are two rooms、the smaller of which is my study room.有两个房间，较小的那个是我的书房。5、Summary 关系副词和关系代词的选择是根据先行词在定语从句中作的成分。若是作状语，则用关系副词或“介词which”；若是作主语或宾语，则用关系代词。Class is over！Please finish your homework carefully.