请教needn't have ,don't have to是什么意思?You needn't have waken me up,I (don't have to)go to work today.1.请问needn't have 是什么意思?don't have to是什么意思?2.这里为什么不能用haven't to,而要用don't have to?
问题描述：
请教needn't have ,don't have to是什么意思?
You needn't have waken me up,I (don't have to)go to work today.
1.请问needn't have 是什么意思?don't have to是什么意思?
2.这里为什么不能用haven't to,而要用don't have to?
答
You needn't have waken me up 这句话用的是虚拟语气，是 本不必 的意思。
don't have to 是一般的否定句。是 不必 的意思。
问一下，你现是中学生还是高中生。 前者是虚拟语气的用法，这应该是高二书本上的知识点，如果没到这层次，不建议去深究，免得和已经学的东西搞混淆了，等老师系统的讲解。
答
needn't have to是本不必做而做了,是虚拟语句don't have to是没必要去做某事