How much the book costs?

问题描述:

How much the book costs?

句子不对,应该改为:How much does the book cost?这本书多少钱?How many books are there?How much books cost?看起来有异曲同工之处,都是疑问词做定语,为什么不省去助动词呢?因为cost是实意动词,疑问句得用助动词do(does)