I think they needn't stay 改I don't think they need to stay 为什么加to_英语解答

I think they needn't stay 改I don't think they need to stay 为什么加to

人气：387 ℃　时间：2019-08-21 08:09:04

解答

第一句的need是情态动词
第二句的need是实意动词.