Question

do you agree that a solider _____ think? a.don't have b.don't has to c. needn't d. needn't to

搞不清是c 还是 d 请详解 need 用法，O(∩_∩)O谢谢.

Answer 1

答案是C
B改为： doesn't have to=needn't就对了
needn't直接加not是情态动词，后面不接to了
need做情态动词一般用于疑问、否定句的。
He needn't come.情态动词
need接to或宾语就是行为动词，其否定式为don't/doesn't need
I need you.行为动词。

Answer 2

选c need做实意动词的时候，搭配是need to do sth 否定用dont need to do.就是在need前面加助动词
做情态动词时，就像can这些一样，否定就说neednt do sth