much,a number of,the number of,a great deal of.四者有什么区别并且在句子中应该怎么使用?

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much,a number of,the number of,a great deal of.四者有什么区别并且在句子中应该怎么使用?
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much,a number of,the number of,a great deal of.四者有什么区别并且在句子中应该怎么使用?
much,a number of,the number of,a great deal of.四者有什么区别并且在句子中应该怎么使用?

much,a number of,the number of,a great deal of.四者有什么区别并且在句子中应该怎么使用?
a number of 和a great deal of 在意思上相同,但用法不一样.a number of 后面只能跟可数名词的复数形式,而a great deal of 后面只能跟不可数名词.
例如:A number of accidents always occur on rainy days.雨天常常有许多事故发生.
A number of books are missing from the library.图书馆的一些书不见了.
I spent a great deal of my time on this work.我在这项工作上花了不少时间.
另外,a great deal of 也可说成a good deal of.
例如:She spends a good deal of money on clothes every year.她每年在衣服上花了不少钱.
除了 a number of 之外,也可以用a large/good number of 或(large) numbers of 来表示数量众多,意思为“大量的,众多的”
例如:Numbers of people came from all parts of the country to see the exhibition.
许多人从国内来参观这个展览.
需要引起注意的是,若用the number of ,后面仍需用名词复数,但谓语动词则应用单数.因为这时表示的是数字,而非数量.
例如:The number of books missing from the library is very large.
图书馆遗失的图书数量很大.
MUCH 同 a great deal of,但是可以做疑问句,
比如HOW MUCH,或者在比较级前面
如:MUCH BETTER,表示好的多
the number of 表示,的数量,和前面的几个的意思完全不沾边

much = a great deal of 修饰不可数名词,“许多”
He doesn't have much ( a great deal of ) money.
the number of “...的数目”The number of the students is 2000.
a number of = many 修饰可数名词,“许多”
We have many ( a number of ) friends here.