How much did the book cost 为什么用did ,而不是was

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How much did the book cost 为什么用did ,而不是was
How much did the book cost 为什么用did ,而不是was

How much did the book cost 为什么用did ,而不是was
cost 是动词,所以用助动词did提问,was是系动词不可以用来对动词提问滴!

cost 是动词啊

答案：【How much did the book cost ?】

翻译；这本书花费了多少钱？

解析；was后面的动词要加ing,而动词cost没有加ing，所以不能用was.再说了用was的话

就变成了过去进行时，与事实不符。

不懂再问，在线为你解答

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答案：【How much did the book cost ?】

翻译；这本书花费了多少钱？

解析；was后面的动词要加ing,而动词cost没有加ing，所以不能用was.再说了用was的话

就变成了过去进行时，与事实不符。

不懂再问，在线为你解答

【帮到你望及时采纳，你的10分满意，我们团队的无限动力】

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本来就不是be动词，跟was有什么关系？

在此cost是动词，提问时带上助动词

cost 是使役动词，并且cost的过去时，过去分词均为cost。根据句意判断时态为过去时，所以以助动词did提问。（PS:如果还有疑问，可以继续追问，很高兴为你解答，谢谢(*^__^*)

陈述句是the book cost XXXyuan.
原句中没有be动词存在，提问就要借用助动词do，考虑到已经买了，用过去时所以是did.

我来回答你吧，满意就给满意回答哦。
原因和cost这个词有关，cost是动词，在疑问句中当然要用助动词do\did啦,而不是用be动词。

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