a number of 和 the number of的区别

求a number of和the number of 的区别，后面是用单数还是复数~

1、意思不同
a number of 相当于 a lot of, many，意思是：许多，一些。 the number of意思是......的数。
The number of sick students is decreasing.生病学生的数量在减少。

A number of students are sick today. 今天一些学生病了。
2、用法不同
a number of 后面动词用复数，the number of 后面动词用单数。
A number of houses were burnt down in the fire. 在火灾中，许多房子给烧毁了。
The number of business failures has risen.企业倒闭的数量增加了。
3、名词用法不同
the number of 表示“……的数目（号码）”，of 后跟复数名词。a number of 相当于many ,意为“许多”，后跟复数名词或代词。number前可用large,small等修饰,以表示程度。
The number of students in this class is 40.（正）这个班的学生数是40。
A number of students are planting trees on the hill．许多学生在小山上植树。

在英文的运用中，“the number of”和“a number of”有混淆的现象；它们后面的动词和名词的数常会有问题。

　　在形式上，“the number of ”和“a number of”相差一点点，一个用定冠词 the；另一个用不定冠词 a.可是在语义和用法上，两者的差别就大了。稍微大意，就会犯了谓语动词和真正主语搭配不当的问题。

　　“A number of”的意思是“若干”或“许多”，相当于 some 或 a lot of，和复数名词连用。当它出现在主语前时，谓语动词和主语搭配。必要时，还可以加上形容词great, large, small, good 等。例如：

　　① A number of highly qualified scholars have worked in Singapore.
　　② A great number of junior college graduates opt for business administration courses.
　　③ There are a large number of teaching posts yet to be filled.
　　④ Only a small number of men want to be language teachers.
　　⑤ A good number of books in the market are examination-oriented.

　　“The number of”和“a number of”一样，跟在后头的名词也是复数的，不同的是这里的主语是单数的 the number，不是它后面的复数名词，谓语动词必须和 the number 呼应，如：

　　⑥ The number of undergraduates has increased over the years.
　　⑦ The number of new houses is unable to cope with the ever-growing population.
　　⑧ The number of college graduates in a country reflects its cultural standard.

　　这三个句子里的 the number 的性质和下列主语一样：

　　⑨ The work of lab technicians is dull but important.

　　⑩ The development of a language centre invariably involves long-term planning, adequate human resources, and up-to-date facilities.

　　11. The organisation of large-scale musical concerts calls for much time and energy.

　　写像上面这样句子的人很多，但是由于真正主语和谓语动词隔得太远，一不小心，就出现了动词和主语不呼应的语法错误，如下：

　　12. The number of foreign workers keep on increasing.

　　13. The number of classrooms, offices, and teaching facilities are far from being sufficient.

　　14. The streaming of students in Singapore and Japan differ.

　　15. The cause of student mobs in some countries are related to governments' dictatorship, corruption and ill-treatment of undergraduates.

　　16. The rapid opening up of China's economy in recent years have prompted our businessmen to venture into the Chinese market.

　　12-16里的谓语动词全部要变成单数才对：keeps; is; differs; is related to; has prompted.

a number of
adj.
许多的
例句：
Interview a number of candidates
对一些候选人进行面谈
a number that when multiplied by itself some number of times equals a given number.
一个数的n次幂等于a时这个数就叫做a的n次方根。
A number of people disagreed.
有几个人不同意。
Consisting of a smaller number.
由少数组成的
a morbid fear of the number 13.
对于数字产生病态的恐惧。
An old number of a magazine.
一期旧杂志
each of a large indefinite number.
关于大而不确定的数值的。
He has a number of books.
他有一些书。
He have a number of book.
他有一些书。
He made a number of inspections.
他对这个地区进行了多次视察。

the number of
可数名词，谓语用单数，意为……的数目
a number of +可数名词，谓语用复数，意为许多，大量的……
the number of +可数名词，谓语用单数，意为……的数目
例句：
The number of students increased.
学生人数增多。
a morbid fear of the number 13.
对于数字产生病态的恐惧。
Having the stated number of rooms
有十个房间的一所房子
limiting the number of children born.
限制孩子出生的数量。
The number is out of order.
电话出故障了。
The number of technical papers accelerated.
技术论文的数量增加了。
The number of tricks thus bid.
定约墩数这样竞叫时约定的墩方数目
The total number of such people.
人口数上述人的总数量
The birth rate is the number of births compared to the number of the people.
出生率是出生数与人口数的比率。
The number of cases of assault or the number of assault on policemen is increasing
侵犯警察身体的案件数正在增加

a number of是大量的 等于a lot of一类 后面接名词复数 the number of是......的数量 后面接名词复数 例如:A number of apples are red 许多苹果是红色的 The number of students is 2000 学生的数量是2000人

a number of 许多的
The number of 数量

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河北区17323764800： a number of 和 the number of 的区别和用法 - ？
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