复数的全部概念
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复数的全部概念
复数的全部概念
复数的全部概念
英语中的集合名词是经常考查的一个考点,它主要涉及集合名词的可数性、单复数意义、主谓一致、恰当的修饰语等.为了便于理解和记忆,我们将一些常考的集合名词分为以下几类,并分别简述其有关用法特点:
第一类
形式为单数,但意义可以用为单数或复数
这类集合名词包括family (家庭),team (队),class (班),audience (听众)等,其用法特点为:若视为整体,表示单数意义;若考虑其个体成员,表示复数意义.比较并体会:
His family is large. 他的家是个大家庭.
His family are all waiting for him. 他的一家人都在等他.
This class consists of 45 pupils. 这个班由45个学生组成.
This class are reading English now. 这个班的学生在读英语.
第二类
形式为单数,但意义永远为复数
这类集合名词包括cattle(牛,牲畜),people(人),police(警察)等,其用法特点为:只有单数形式, 但却表示复数意义,用作主语时谓语用复数;不与 a(n) 连用,但可与the连用(表示总括意义和特指).如:
People will laugh at you. 人们会笑你的.
The police are looking for him. 警察在找他.
Many cattle were killed for this. 就因为这个原因宰了不少牲畜.
注:表示牲畜的头数,用单位词 head(单复数同形).如:
five head of cattle 5头牛,fifty (head of ) cattle 50头牛
第三类
形式为复数,意义也为复数
这类集合名词包括goods(货物), clothes(衣服)等,其用法特点是:只有复数形式(当然也表示复数意义,用作主语时谓语也用复数),但通常不与数词连用.如:
Clothes dry slowly in the rainy season. 衣服在雨季不易干.
Such clothes are very expensive. 那样的衣服很贵.
If goods are not well made you should complain to the manufacturer. 如果货物质量不好,则理应向制造商提出控诉.
第四类
形式为单数,意义也为单数
这类集合名词包括baggage / luggage(行李), clothing(衣服), furniture(家具), machinery(机器), poetry(诗), scenery(风景), jewelry(珠宝), equipment(设备)等, 其用法特点为:是不可数名词,只用单数形式,不用不定冠词(当然更不能用数词),没有复数形式.如:
Our clothing protects us from [against] the cold. 我们的衣服可以御寒.
Have you checked all your baggage? 你所有的行李都托运了吗?
The thief stole all her jewelry. 小偷把她所有的首饰都偷走了.
The hospital has no decent equipment. 这家医院没有像样的设备.
The Tang Dynasty is thought of as the high summer of Chinese poetry. 人们认为唐朝是中国诗歌的全盛时期.
注:machinery, poetry, jewelry, scenery等相应的个体可数名词是 machine, poem, jewel, scene等.如:
a poem / a piece of poetry 一首诗
many machines / much machinery / many pieces of machinery 许多机器
第五类
补充几个常考的集合名词
除上面提到的四类集合名词外,以下几个集合名词也应重点注意(因为它们也是常考考点):
1. hair(头发,毛发)
指全部头发或毛发时,为集合名词(不可数);指几根头发或毛发时,为个体名词(可数).如:
My hair has grown very long. 我的头发已长得很长了.
The police found two hairs there. 警察在那儿找到了两根头发.
2. mankind(人类)
是一个不可数的集合名词,不用复数形式,也不连用冠词.如:
This is an invention that benefits mankind. 这是一项造福人类的发明.
Mankind has its own problems. 人类有自己的问题.
注:mankind 表示“人(类)”时,虽不可数,但有时却可以表示复数意义,尤其是当其表语是复数时.如:
Mankind are intelligent animals. 人是理智的动物.
3. fruit(水果)
作为集合名词,它通常是不可数的.如:
He doesn’t eat much fruit. 他不大吃水果.
He is growing fruit in the country. 他在乡下种水果.
但是,当要表示种类时,它可视为可数名词,即a fruit 指一种水果,fruits 指多种水果.比较:
Some fruits have thick skins. 有些水果皮很厚.
The potato is a vegetable, not a fruit. 土豆是一种蔬菜,而不是一种水果.
集合名词作主语时,主谓一致关系是一个较为复杂的问题.对此类问题我们可以从“数”的角度分为四类.
1)单数—复数型.凡是有复数词尾变化形式的集合名词都属于此类.如:a class—classes; a family—families; a government—governments; an army—armies; a people—peoples; a group—groups; a crowd—crowds; a crew—crews等.这类集合名词强调的是整体性,即当作一个整体或多个整体来看待.属于这类集合名词的单数作主语时,谓语动词用单数;复数形式作主语时,谓语动词用复数.
【例如】
A big crowd often gathers on the square every morning.
The government has decided to pass the bill.
There are huge crowds in the streets on Sunday.
There are many English-speaking peoples in the world.
但应注意,这类集合名词的单数形式有时表示复数概念,所以这些集合名词的单数形式也可归为“单复同形型”中.
2)单数型.这类集合名词表示的是人或事物的整体,即把这类人或事物的全部包括在内,所以只有单数形式.如作主语,谓语动词常用单数.这类名词常见的有:humanity, mankind, proletariat等.
【例如】The proletariat is the greatest class in the history of mankind. In the fields of production and scientific experiment, mankind makes constant progress.
3)复数型.这类集合名词在形式和内容上是相互矛盾的,就是说它们只有单数形式,但表达的都是复数概念.它强调的是集体中的个体性.这类名词有:police, cattle, faculty, flock, machinery, vermin, personnel等.它们作主语时,谓语动词要用复数.
【例如】The police have caught the murder.
Our personnel are very highly trained.
The vermin are very dangerous.
4)单复同形型.这类集合名词的单数形式既可表示单数也可表示复数.作主语时,用单数动词或复数动词均可,有时意义区别不大.
【例如】The school teaching staff are (is) excellent.
The public is (are) requested not to litter in the park.
The teaching profession claim(s) to be badly paid.
这类集合名词常见的有:class, family, team, crew, board, herd, committee, party, jury, enemy, audience等.
根据说话人的心理意向若把这个集合名词所代表的人或事物看作一个整体,就认为是单数,用单数动词;若把它所代表的人或事物看作若干个个体的话,就认为其为复数,用复数动词.
试比较:The football team is playing well.
那个足球队打得非常漂亮.
The football team areshavingsbath and are then coming back here for tea.
足球队员们正在洗澡,然后来这里吃茶点.
The family is a very happy one.
那个家庭是一个非常幸福的家庭.
That family are very pleased about the news of William's success.
,复数的实部和虚部都是实数。 说明:对于复数的定义,特别要抓住 这一标准形式以及 是实数这一概念,这对于解有关复数的问题将有很大的帮助。 (2)