Question

l ___go there this morning,so l stayed at home A.

l ___go there this morning,so l stayed at home A.didn't need to B.didn't need C.needn't to 选哪个？？为什么

Answer 1

答案：A

解释：如果使用need to do sth，则表明need是实意动词而不是情态动词。
因为情态动词其后直接加动词原形，所以必须说成need do sth。
既然need是实意动词，则其做谓语时句子的否定句必须借助于助动词don't, doesn't或didn't来变化，所以正确答案为didn't need to.