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1、 Teachers who are kind are popular with the students.友善的老师受学生欢迎。友善的老师受学生欢迎。Mr.Wang,who is kind,is popular with the students.王老师很受学生欢迎，他很友善。王老师很受学生欢迎，他很友善。Teachers who are kind are popular with the students.Mr.Wang,who is kind,is popular with the students.分析两种定语从句省略后的结果分析两种定语从句省略后的结果:限制性定语从句限制性定语从句省略
2、后主语所指省略后主语所指就不明确，就不明确，所以不能省略。所以不能省略。非限制性定语从非限制性定语从句省略后意义句省略后意义 仍仍旧完整，旧完整，所以可以省略。所以可以省略。形式形式作用作用能否能否省略省略翻译翻译限制性限制性定语定语 从句从句非限制非限制性定语性定语从句从句逗号逗号隔开隔开修饰修饰限定限定补充补充说明说明能能不能不能的的两个两个句子句子无无 逗号逗号非限制性定语从句是先行词的附加说明非限制性定语从句是先行词的附加说明非限制性定语从句是先行词的附加说明非限制性定语从句是先行词的附加说明,去掉了也去掉了也去掉了也去掉了也 不会影响主句意思不会影响主句意思不会影响主句意思不会影响主
3、句意思,它与主句之间通常用逗号分开。它与主句之间通常用逗号分开。它与主句之间通常用逗号分开。它与主句之间通常用逗号分开。引导引导引导引导“非限定非限定非限定非限定”的关系词有：的关系词有：的关系词有：的关系词有：1.1.指人时：指人时：指人时：指人时：2.2.指物时：指物时：指物时：指物时：which which（可指某个词也可指整个主句，（可指某个词也可指整个主句，（可指某个词也可指整个主句，（可指某个词也可指整个主句，从句只能位于主句之后）从句只能位于主句之后）从句只能位于主句之后）从句只能位于主句之后）as as （表示正如，可位于主句前或主句后）（表示正如，可位于主句前或主句后）（表示
4、正如，可位于主句前或主句后）（表示正如，可位于主句前或主句后）3.3.指地点时：指地点时：指地点时：指地点时：4.4.指时间时：指时间时：指时间时：指时间时：5.5.指缘由时：指缘由时：指缘由时：指缘由时：非限制性定语从句的用法非限制性定语从句的用法 who,whom,whosewhich,aswhere=相应介词相应介词+whichwhen=相应介词相应介词+whichfor which（切不行用（切不行用why）1.The famous basketball star,_ is an American,came to China yesterday.2.In those days,she
5、used to go to Mr.Black,with _ she had a wonderful time.3.I bought a car yesterday,_ cost me a lot.4.Xian,_ I visited last year,is a nice old city.5.He will come to see me next July,_ he wont be so busy.6.The school,_ I once studied,was built thirty years ago.7.John said hed been working in the offic
6、e for an hour,_ was true.8.The managers daughter,_ name is Ann,gave me a patient smile.whowhomwhichwhich课课堂堂练练习习whenwherewhichwhose 在在 of which/whom 之前可以运之前可以运用表达数量或定位的数词或代词用表达数量或定位的数词或代词1.I am doing different types of exercises,all of _ are quite helpful to my health.2.Many people,some of _ are not
7、 overweight,are going on diets.3.There are 54 students in my class,three of _ come from US.whichwhomwhom“非限定非限定非限定非限定”运用须知运用须知运用须知运用须知1.1.从句中全部的关系词都不行省略从句中全部的关系词都不行省略从句中全部的关系词都不行省略从句中全部的关系词都不行省略2.2.从句通常不能用从句通常不能用从句通常不能用从句通常不能用thatthat引导引导引导引导3.3.在在在在“非限定非限定非限定非限定”中中中中,指人的关系代词作宾语时指人的关系代词作宾语时指人的关系代词作宾
8、语时指人的关系代词作宾语时,只能用宾格只能用宾格只能用宾格只能用宾格whom,whom,不能用不能用不能用不能用whowho替换替换替换替换,也不能省略。也不能省略。也不能省略。也不能省略。4.4.从句不能用从句不能用从句不能用从句不能用whywhy引导引导引导引导,要用要用要用要用 for which for which 代替代替代替代替whywhy5.5.从句置于句首时从句置于句首时从句置于句首时从句置于句首时,不能用不能用不能用不能用whichwhich引导引导引导引导;而要用关系代词而要用关系代词而要用关系代词而要用关系代词 as as 引导引导引导引导(as(as可放主句前可放主句前
9、可放主句前可放主句前,也可放主句后也可放主句后也可放主句后也可放主句后)要点归纳要点归纳 1)I have a sister who works in a hospital.我有一位在医院工作的姐姐。我有一位在医院工作的姐姐。（不只一位姐姐）（不只一位姐姐）2)I have a sister,who works in a hospital.我有一位姐姐，她在医院工作。我有一位姐姐，她在医院工作。（只有一位姐姐）（只有一位姐姐）留意留意1：有时同一个限制性从句变为非限：有时同一个限制性从句变为非限制性从句会变更全句的意思。制性从句会变更全句的意思。as 和和 which 可指代整个主句可指代整个
10、主句 as 可放在句中或句首可放在句中或句首,which 只放在句中只放在句中_ we know,smoking is harmful to ones health.The sun heats the earth,_ is very important to us.Aswhich留意留意3:as/which 引导非限定性定语从句的引导非限定性定语从句的区分区分 关系代词关系代词asas在定语从句中指代整件在定语从句中指代整件事，充当句中的主语或者宾语，它常常事，充当句中的主语或者宾语，它常常和和the same,such,asthe same,such,as一起搭配运用，一起搭配运用，共同构成
11、一个固定词组。共同构成一个固定词组。As we all know,he is a famous As we all know,he is a famous scientist.scientist.As is expected,he is a diligent boy.As is expected,he is a diligent boy.She has the same book as you have.She has the same book as you have.as 引导非限制性从句，常意为引导非限制性从句，常意为“正如正如”。可出现在句首、句中、句末。常见结构有：可出现在句首、句中
12、、句末。常见结构有：as is known to all as is often the caseas might/could be expected as has been said beforeas has been mentioned aboveas has been pointed out as can be imaginedas can be seen(from these figures)as often happens as will be shown这是常有的事这是常有的事 正如人们所预料的正如人们所预料的 正如上面所提到的正如上面所提到的 正如前面所说的正如前面所说的 正如所
13、指出的正如所指出的 正如正如所示所示 The earth is round._ is known to all.The earth is round,_ is known to all._ is known to all,the earth is round._ is known to all that the earth is round._ is known to all is that the earth is round.Itwhich/as AsItCompare:(定从定从)(形式主语形式主语)What（主语从句）（主语从句）留意留意4：非限制性定语从句和简洁句的比较：非限制性定语从句和简洁句的比较1)He failed in the exam._ made his parents angry.2)He failed in the exam,_ made his parents angry.3)He has two sons.Both of _ are teachers.4)He has two sons,both of _ are teachers.Thiswhichwhomthem