非限制性定语从句
单元语法巩固提高练习
【难点突破】
一、限制性定语从句和非限制性定语从句的区别
根据定语从句与先行词的关系是否紧密,可分为限制性定语从句和非限制性定语从句。非限制性定语从句与先行词的关系松散,只是补充说明,书写时常常使用逗号隔开,翻译时常常译为并列句。关系代词that不引导非限制性定语从句。见下表:
限制性定语从句 非限制性定语从句
形式上 不用逗号“,”,与主句隔开。 用逗号“,”,与主句隔开。
意义上 是先行词不可缺少的定语,若删除,主句则失去意义或意思表达不完整。 只是对先行词的补充说明,若删除,主句仍能表达完整的意思。
译法上 译成先行词的定语:“……的” 通常译成主句的并列句。
关系词的使用上 A.作宾词时可省略B.可用thatC.可用who代替whom A.不可省略B.不用thatC.不可用who代替whom
注意区分下列几组句子的不同含义:
1.Her brother who is now a soldier always encourages her to go to college.
她那当兵的哥哥总是鼓励她上大学。(意含:她还有其他哥哥。)
Her brother, who is now a soldier, always encourages her to go to college.
她哥哥是当兵的,他总是鼓励她大学。(意含:她只有一个哥哥。)
2.All the books that have pictures in them are well written.
所有里面带插图的书都写得很好。(意含:不带插图的书则不一定写得很好。)
All the books, which have pictures in them, are well written.
所有的书都带插图,这些书都写得很好。(意含:没有不带插图的书。)
提示:限制性定语从句一般有先行词,定语从句紧随其后,不使用逗号分开,翻译成中文时,一般把定语从句翻译在被修饰词(即先行词)前面。而非限制性定语从句可有、也可没有先行词,一般使用逗号隔开,可把定语从句翻译在被修饰词(即先行词)前面,也可以翻译在其后,作为附加说明。有时,对两者的理解还会产生歧义。例如:
Mr.Wang’s brother who is twenty years old is a policeman.
王老师的那位20岁的弟弟是一位警察。(不只一个兄弟)
Mr.Wang’s brother, who is twenty years old, is a policeman.
王老师弟弟今年20岁,他是一位警察。(不清楚有几个兄弟)
非限制性定语从句的使用场合
使用场合 例句
1.先行词为独一无二的物体时 The sun, which rises in the east, gives us light and heat.太阳从东边升起,给我们光和热。
2.先行词是指物的专有名词时 The Great Wall, which is called in chinese “The Ten-Thousand Li Great Wall”, is actually more than 6,000 kilometers.长城, 中国人称作“万里长城”实际有6000多公里。
3.先行词指物而且被指示代词或人称代词修饰时 This is her house, which was built last year.这是他的房子,去年建的。
4.定语从句修饰整个主句时 He is from America, which I know from his accent.他是美国人,这一点我是从他的口音得知的。
三 非限制性定语从句引导词的选择
1.关系代词的选择
非限制性定语从句的关系代词不能用that。指人时,如果引导词作主语,用who;作宾语用whom,指物时,用which。引导词作宾语也不能省略。
Mr.Zhang, who came to see me yesterday, is an old friend of my father’s.
张先生昨天来看我,他是我父亲的一位好朋友。
Miss Howe, whom you met at the station, is from America.
豪小姐是美国人,你在车站见过她。
The Great Wall of China, which was built by Chinese ancient people, is regarder as one of the few wonders of the world.
长城是中国古代人民修建的,它被看作是世界上少有奇迹之一。
2.关系代词和关系副词的选择
在非限制性质定语从句中,关系代词或关系副词的选择方法和限制性定语从句中的一样,引导词在从句中作主语或宾语时,用关系代词;作状语时,用关系副词。
I want to buy the house, which has a garden.
我想买那所带花园的房子。
The place, which I visited before, has changed greatly.
这个地方我以前来过,现在变化很大。
The story in the books takes place in Canada, where Doctor Bethune was born.
书中的故事发生在加拿大,白求恩就是在那里诞生的。
3.关系副词和人称代词、指示代词的选择
选关系代词,还是指示代词,关键是分清句子结构,如果是非限制性定语从句,用关系代词;如果是并列句,用人称代词或指示代词。请比较;
a.He has three sons, none of whom is a doctor. 他有三个儿子,没有一个是医生。
b.He has three sons, who are doctors. 他有三个儿子,都是医生。
c.He has three sons, but none of them is a doctor. 他有三个儿子, 但没一个是医生。
d.He has three sons; they are doctors. 他有三个儿子,他们都是医生。
【归纳拓展】
四.as引导的定语从句
1.as用关系代词和关系副词引导限制性定语从句,并在从句中作定语、表语或状语,构成the same …as, such…as等结构。例如:
①I like the same book as you do.(as作宾语)我和你喜欢同样一本书。
②I shall do it in the same way as you did.(as作状语)我也该用你的方法做这件事。
③I want to have such a dictionary as he has.(as作宾语)我想有一本他那样的字典。
2.as引导非限定性定语从句。as在定语从句中作主语、表语或宾语,这个定语从句是说明整个句子,它可以放在主句之前。例如:
①As we all know, he studies very hard.(as作宾语)正如我们所知道的,他学习很刻苦。
②As is known to all, he is the best student in our class.(as作主语)大家都知道,他是我们班里好的学生。
注意:当先行词受the same修饰时,偶尔也用that引导定语从句,但与as的定语从句意思有区别。
如:
3.关系代词which 和 as在定语从句中的区别:
1)as 和 which 都可以引导非限制性定语从句,指代整个主句的内容。非限制性定语从句位于句末,且as 和 which 在从句中作主语、宾语或表语时,两者可以互换。如:
He married her, as/which was natural. 他跟她结婚了, 这是很自然的事。
He is honest, as/which we can see. 他很诚实,这一点我们看得出来。
She failed in the exam, which/as was natural. 她考试没及格,这很自然。
He is an honest boy, which/as anybody can see. 任何人都看得出来,他是一个诚实的人。
2)as引导的非限制性定语从句可以放在主句之前或之后,甚至还可以分割主句。which 引导的非限制性定语从句只可放在主句之后。另外,as常常有“正如、正像”的含义。如:
As is known to all, China is a developing country. 众所周知,中国是发展中国家。
He is from the south, as we can know from his accent.
他是南方人,这一点我们从他的口音可能知道。
John, as you know, is a famous writer. 正如你所知,约翰是一位著名的作家。
Zhang Hua has been to Paris then times, which I don’t believe. 张华已去过巴黎十次了,这一点我不相信。
【注意】
①如果非限制性定语从句位于主句之前,或插在主句之中时,只能用as。
As we have seen, oceans cover more than 70 percent of the earth.
我们已经看到,海洋占地球面积的70%之多。
This knod of computer, as is well known, is out of date.
众所周知,这种计算机已经过时了。
②as 在句中作主语,后面常跟行为动词的被动式,which 在从句中作主语,后常用跟行为动词的主动式。
She have been late again, as was expected.
他又迟到了,这在预料之中。
It rained hard yesterday, which prevented me from going to the park.
昨天雨下得很大,我无法去公园。
Kate always tells a lie, which her parents find strange.
凯特总是说谎,这让她父母感到奇怪。
③as 常用在as often happens, as was pointed out, as was said above, as I remember,as
I understand 等结构中。
Jack has won the first prize, as often happens. 像往常一样,杰克获得了一等奖。
④当主句和从句之间存在着逻辑上的因果关系时,关系词往往只用了which。如:
Tom was late for school again and again, which made his teacher very angry.
汤姆上课老是迟到,这使得老师很恼火。
These tables are made of metal, which made them very heavy.
这些桌子是用金属做的,这使得它们很重。
五、使用定语从句时特别注意的几个问题
掌握好定语从句,对关系代词的理解是至关重要的。这主要是指关系代词的选择与省略及关
系代词在从句中的成分。后者对于关系副词的理解及定语从句和同位语从句的区分都起着关
键性的作用。因此在学习定语从句时首先要认真研究关系代词。
1.介词+关系代词whom(人)/which(物), 在从句中作状语。例如:
Mr Jones, for whom I was working, was very generous about overtime papyments.
我为琼斯先生工作,他在付超时工资时,很慷慨。
I bought a dozen of eggs, six of which broke when I dropped the box at my door.
我买了一打鸡蛋,当我在门口撂箱子时,其中六个破了。
1)介词的确定
①与定语从句中谓语动词的搭配有关
He told me thing of which he is not too sure.(sure of 对……有把握)
②与先行词的搭配有关
I don’t like the way in which she speaks. (in the way 是固定搭配)
③与所要表达的意有关
Germany is the country against which we fight.(fight against是指交战的对方)
Germany is the country with which we fight.(fight with可以指交战的伙伴)
2.从句的谓语动词单复数的问题
关系代词在从句中作主语时,从句的谓语动词单数还是用复数应由先行词决定。例如:
The man who lives downstairs speaks English fluently.
住在楼下的那个人英语说得很流利。
The students who are in Grade Three are going to climb the hill tomorrow.
3.定语从句与同位语从句的区别
定语从句修饰限定先行词,它与先行词是修饰关系;同位语从句说明先行词的具体内容,它
行词是同位关系。
The plane that has just taken off is for Paris.(定语从句)刚刚起飞的那架飞机是往
巴黎的。
The fact that he has already died is quite clear.(同位语从句)他已经去世了,这个
事实很明了。
定语从句由关系代词或关系副词引导、关系词在从句中担当相应的句子成分,关系代词在从
句中作宾语时经常可省略。同位语从句主要由连词that引导,在从句中一般不担当成分;
有时也由where,when,how,who,whether,what等连词引导,这些词则在从句中担当成分。
She wore the same dress that she wore at Mary’s wedding.
她穿着她在玛丽婚礼上穿过的同一条连衣裙。
She wore the same dress as her younger sister wore.
她穿着跟她妹妹所穿的一样的连衣裙。
The news that he told me is true.(定语从句)他告诉我的消息是真的。
The news that he has just died is true.(同位语从句)他刚刚去世了,这个消息是真的。