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(共17张PPT)
非限制性定语从句
非限制性定语从句
（一）特点
1.非限制性定语从句与先行词之间一般用逗号隔开，是对先行词的附加说明；去掉从句，句子剩余部分的意思仍然完整。
2.非限制性定语从句的先行词既可以为单个的名词或代词，也可以为整个句子或其中一部分，且常译成并列的分句。
He often comes to class late， which makes his teacher very angry.
（二）引导非限制性定语从句的关系词
1.关系代词
（1）who、 whom指人；who在定语从句中作主语、宾语或表语； whom作宾语；介词后用whom，不用who；
（2）whose作定语，先行词是人时，“whose＋名词”相当于“the＋名词＋of whom”；先行词是物时，“whose＋名词”相当于“the＋名词＋of which”；
（3）which指物，在从句中作主语、宾语或表语。
Ⅵ 非限制性定语从句
① This is our headmaster, who I think has something crucial to tell you.
② There are twenty students in this class, whose backgrounds are different.
③He has been busy with his work the whole holiday, which has made his girlfriend unhappy.
Ⅵ 非限制性定语从句
Ⅵ 非限制性定语从句
Attention
2.关系副词
（1）when指代时间，在从句中作时间状语，
可以和介词+关系代词替换
（2）where指代地点，在从句中作地点状语
可以和介词+关系代词替换
（3）why不能引导非限制性定语从句，可用for which代替。
Ⅵ 非限制性定语从句
例句：
1. We will put it off until next Sunday, when/on which we won’t be so busy.
2. Yesterday, they went out to have a picnic in the park, where/in which they had a good time.
3. The reason, for which he was absent from the meeting, wasn’t clear.
Ⅵ 非限制性定语从句
①Kate， 　whose　 sister I shared a room with when we were at college， has gone to work in Australia.
②He is a Chinese student named Li Hua， 　who　 is studying in London during the summer vacation.
③We have launched another man－made satellite， 　which　 is announced in today’s newspaper.
④The Mid－Autumn Festival falls on 15 August of the Chinese lunar calendar， 　when　 a family get together and enjoy the dinner.
whose　
who　
which　
when　
Exercises
四、 “介词＋关系代词”引导的定语从句
在“介词＋关系代词”中，关系代词用whom指人， 用which指物。
He worked in a car factory for four years， after which he founded his own company in his hometown.
I recommend Liu Cixin’s The Three－Body Problem to you， from which I believe you will gain some science fiction knowledge.
The committee consists of ten members， all of whom are in favour of the plan.
　用适当的关系词填空
①She gave me two books，both of 　which　 I didn’t like.
②Participants， most of 　whom　 are middle school students， will meet at the Olympic forest park.
③You know we Chinese have a lot of traditional art forms， of 　which　 paper－cutting is one of the most popular.
which　
whom　
which　
Ⅶ as引导的定语从句
（一）用在限制性定语从句中：指人或物，在从句中作主、宾、表 常用句型有：such...as...,the same as...
Such machines as are used in our workshop are made in China.（主）
I have the same book as he has.（宾）
（二）用在非限制性定语从句中：指代整个主句或主句中的一部分
As we all know, China is a developing country.
Ⅶ as引导的定语从句
常见句型: as is known to all, as is said/reported/announced/expected, as is mentioned above, as we all know, as we can see, as is often the case... ...
Ⅶ as引导的定语从句
（三）as与which引导非限制性定语从句时的区别
as which
指代 只能指代整个主句 既可指代整个主句，也可指代主句的一部分
位置 可位于主句前、中、后 不能位于主句之前
意义 正如 这，那
功能 指出主句内容的根据或出处 在意义上相当于一个并列句
① The singer, as was expected, achieved great success.
② He failed to pass the English exam, which made his father very angry.
选词填空（as/which）
① 　As　 is mentioned in your report， traditional Chinese medicine has shown great power in the epidemic prevention.
②There is no simple answer, 　as　 is often the case in science.
③The president of the World Bank says he has a passion for China, ich　 he remembers starting as early as his childhood.
④ 　As　 is known to us all， the 19th Asian Games will be held in Hangzhou.
As　
as　
As　
which　
Exercises
the way 作定语从句的先行词，关系词的使用：
从句缺主语、宾语或表语 ，使用关系代词which/that，缺宾语关系词可省略；
Can you tell me the way (which/that) you use
从句缺 方式状语 ，使用that/in which或省略。
I admire the way (that/in which/省略) he handles stress.）
Ⅷ 其他情况
Thank you !

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