the number of sth 做主语谓语动词用单数还是复数 做主语时，谓语动词是单数还是复数

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the number of... \u610f\u601d\u662f\u201c\u2026\u2026\u7684\u6570\u76ee\u201d\uff0c\u4e2d\u5fc3\u8bcd\u662fnumber\u201c\u6570\u76ee\u201d\u201c\u6570\u91cf\u201d\uff0cnumber\u6ca1\u6709\u52a0s\uff0c\u8bf4\u660e\u662f\u5355\u6570\uff0c\u6240\u4ee5\u5176\u8c13\u8bed\u52a8\u8bcd\u7528\u5355\u6570\u3002

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\u5982\u679c\u4e3b\u8bed\u662f\u590d\u6570\u6216\u8005\u662f\u7b2c\u4e00\u3001\u4e8c\u4eba\u79f0\uff0c\u8c13\u8bed\u5c31\u7528\u539f\u578b\u3002
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\u5c31\u662f\u4e3b\u8bed\u770b\u6210\u4e00\u4e2a\u6574\u4f53\uff1a
\u4f8b\u5982\uff1aTen dollars is enough.
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the number of+名词作主语，谓语动词用单数。
而A number of + 名词作主语，谓语动词用复数。

the number of+复数名词作主语，意思是“。。。。。的数量，数目”， 谓语动词用单数。
而A number of +复数 名词作主语，意思是“许多。。。。。。”， 谓语动词用复数。

the number of 是......的数量的意思，谓语动词必须接单数。
如：The number of the students in our school is 235.
a number of 是许多的意思，相当于a lot of.谓语动词用复数。
如：A number of people were injured in the terrible earthquake.

主语是“ a number of+ 复数名词”时，谓语动词要用复数形式；若主语是“ the number of+ 名词”时，谓语动词则要用单数形式。例如：

The number of the people invited was fifty, but a number of them were absent for different reasons.

the number of+名词作主语，谓语动词用单数
A number of + 名词作主语，谓语动词用复数