有mustn't have done这个结构么?表示什么?

来源：学生作业帮编辑：神马作文网作业帮分类：英语作业时间：2024/11/10 15:55:22

有mustn't have done这个结构么?表示什么?
mustn't have done这个结构是表示“对过去事情的很否定的推断”呢还是表示虚拟“本禁止做某事可实际上却做了”,还是说根本就没有这种结构?
有没有例子呢？

哎,这是must have done 表推测的用法,表示对过去某事的肯定猜测,译为过去肯定做了某事,其can /could 来表示或疑问形式必须用can /could 来表示
例如
Since the road is wet ,it must have rained last night
只有
He can't have missed the way ,i drew him a map
完全没有你说的那种用法,不存在mustn't have done这个结构,要用can /could 来表示,
不要误人子弟

有mustn't have done这个结构么?表示什么? 可用mustn't have done表示对过去的推测吗?若可以,那这个结构与can't have done有区别吗? 1、shouldn't have done mustn't have done can't havedone 有什么区别 couldn't have done 表示什么 mustn't have done和can't have done的区别 must 和 have to 有什么不一样?mustn't 和 don't have有什么不一样? were to have done 和 should have done 都表示虚拟的本应该有什么去区别么? couldn't have done和mightn't have done有什么区别情态动词can't have done 和couldn't have done 有什么区别吗 mustn't needn't 有什么区别么? 英文mustn't,don't have to,doesn't have to,didn't have to有什么区别情态动词的中文解释must have done和mustn't have doneneed have done和need