the number of mistakes in his composition has been dropped 为什么用的是has ...请详细回答,

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the number of mistakes in his composition has been dropped 为什么用的是has ...请详细回答,
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the number of mistakes in his composition has been dropped 为什么用的是has ...请详细回答,
the number of mistakes in his composition has been dropped 为什么用的是has ...请详细回答,

the number of mistakes in his composition has been dropped 为什么用的是has ...请详细回答,
“the number of” 是固定用法,表示“...的数量”“...的数目” ,它本身是单数集合词.所以,动词用单数.
“A number of"是另外意思的词组,表示："一些" 的意思.动词是用复数形式的.在你的这个句子里不能用.

the number of ^…的数量是...（谓语动词用单数）

a number of the number of the number of,a small number of,a number of. the number of造句 the number of造句 the reciprocal of number the number of中文 the number of 是什么意思? the number of同义词 The number of students Number of the black the number of、a number of、large number的区别 翻译the system of number The total number of 中文 the number of的用法 a number of the students What’s the number of The number of errors( )surprising the number of revolutions是什么意思?