为什么How much are they?用are,而How much do they cost?就用do呢?

来源：学生作业帮助网编辑：作业帮时间：2024/04/28 10:22:31

为什么How much are they?用are,而How much do they cost?就用do呢?
为什么How much are they?用are,而How much do they cost?就用do呢?

为什么How much are they?用are,而How much do they cost?就用do呢?
因为how much are they 里面没有动词,而how much do they cost 有动词 cost 只要有动词就一定要用/do or does (一般现在时),但两者意思一样.

实意动词的疑问式需借助助动词来完成

How much are they?
它们是多少钱?
这里用的是联系动词“是(be)”，而联系动词be(am/is/are)的疑问句就直接把它放到主语前面。
How much do they cost?
它们化了多少钱？
这里的“化(cost)”是实意动词，而所有实意动词的复数一般现在时的疑问句必须用助动词do放到主语全面去。...

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因为前者谓语是are，而后者谓语是cost

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