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专题03 重点语法复习: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,如果去掉,句子剩余部分的意思仍然完整。
①The children,who wanted to have a journey to the valley,were disappointed when the journey was cancelled.
那些想去山谷旅行的孩子都因旅行的取消而感到失望。
②That they will get married,which has not been announced,has spread around.
他们要结婚的消息还没有被宣布,却已经被传得沸沸扬扬。
2.非限制性定语从句的先行词既可为单个的名词或代词,也可为整个句子或其中一部分,且常译成并列的分句。
①We’ll graduate in July,when we will be free.(先行词为名词)
我们将于七月份毕业,到那时我们就自由了。
②He often comes to school late,which makes his teacher angry.(先行词为主句的内容)
他经常上学迟到,这使得他的老师很生气。
二、关系词
1.关系代词
which 指物,在从句中作主语、宾语或表语;who/whom指人,who在从句中作主语,而whom在从句中作宾语;as既可指人也可指物,在从句中作主语、宾语或表语;whose既可指人也可指物,在从句中作定语。
①He has good manners,as could be judged from his behavior.
他很讲礼貌,这从他的行为可以判断出来。
②Mr. King,whose legs were badly hurt,was quickly taken to hospital.
金先生迅速被送去医院了,他的腿受了重伤。
2.关系副词
when指代时间,在从句中充当时间状语,可与“介词+which”互换;where指代地点,在从句中充当地点状语,也可与“介词+which”互换。
①We will put off the outing until next Sunday,when/on which we won’t be so busy.
我们将把郊游推迟到下个星期天,那时我们就不会这么忙了。
②Yesterday,they went out to have a picnic in the suburb,where/in which they had a good time.
昨天,他们到郊区去野餐了,在那里他们玩得很开心。
【名师点津】
(1)非限制性定语从句可将整个主句作为先行词,对其进行修饰,这时从句谓语动词要用第三人称单数形式。
(2)在非限制性定语从句中,先行词为reason时,关系词不用why引导,用for which代替why。
①He has been busy with his work the whole holiday,which has made his girlfriend unhappy.
他一整个假期都忙于工作,这令他的女朋友很生气。
②The reason,for which he couldn’t reduce his consumption,wasn’t given.他为何不能降低消费,他没有给出任何理由。
三、as与which引导非限制性定语从句的区别
as
which
指代
引导从句只能指代整个主句的内容
引导从句既可指代整个主句的内容,也可指代主句的一部分
位置
可位于主句之前,之中或之后
引导从句不能置于主句之前
意义
正如
这,那
功能
连接上下文,表达说话人的观点、看法,并指出主句内容的根据或出处等
引导的从句在意义上相当于一个并列句
①As we all know,the earth moves around the sun.众所周知,地球围绕太阳转。
②The singer,as was expected,achieved a great success.正如所期盼的那样,这位歌手取得了巨大成功。
③Catherine will attend a friend’s wedding,which she is busy preparing for now.凯瑟琳将参加一个朋友的婚礼,现在她正在为此做准备。
四、限制性定语从句与非限制性定语从句的区别
限制性定语从句
非限制性定语从句
意义
起限定作用,指特定的人或物,从句不可省略,否则原句句意不完整
仅作补充或说明作用,若去掉从句,主句意思仍然完整
结构要求
紧跟先行词,从句与先行词之