the number of the workers here is about 50.句中为什么用is而不是are?

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the number of the workers here is about 50.句中为什么用is而不是are?

the number of the workers here is about 50.句中为什么用is而不是are?
the number of the workers here is about 50.句中为什么用is而不是are?

the number of the workers here is about 50.句中为什么用is而不是are?
the number of 做主语谓语动词用单数
a number of 做主语谓语动词复数
一定要记住,这以后经常用到!

主语是 the number