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

问题描述:

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

实际上,在口语里,人们说:
I think they don't need to stay.
但是,I don't think they need to stay。 更好一些。否定放在前面。

第一个最准确,庞家的就是好!
上面那个,不会就别说,这是从句,只是连词省略了!

第一句的need是情态动词
第二句的need是实意动词.

第一句中need是情态助词。第二句中是动词所以要加to