题目内容：

I don't think he ____a new bike. A. need to buy B. needs buy C. need D. need buy
选D. 因为need 做情态动词使用.
你怎么认为?

优质解答

如果选A,need实意动词该用单三,needs to buy
选B,是情态动词,没有数的变化,所以选D ,情态动词need 用于疑问句和否定句,这里是否定句,因为前面有don't.