if引导虚拟语气三种用法,did,should do,were to do有什么区别?

来源：学生作业帮编辑：拍题作业网作业帮分类：英语作业时间：2024/04/28 02:03:35

did 即一般过去时,表示与当前的实际情况相反的假设,
If you were not here ,I would leave at once .要不是你在这儿,我就立即走人了.
should do 表示与将来可能的情况相反,were to do 也是如此,表示与将来可能的情况相反.
If it should rain tomorrow ,the plan would be ruined .如果明天有雨,计划就泡汤了.

英语虚拟语气 if条件从句,与将来事实相反,从句用did ,were to do,should do.有什么区别? 虚拟语气对将来的推测中if+主语+were to do if+主语+should+do if+主语+did/were三种虚拟语气中,与将来事实相反,if从句中should do和were to do有区别吗? 虚拟语气,在与将来事实相反中'did/were''were to do''should do'何时用何种? were to do 与should be的区别虚拟语气中虚拟语气中的would/conld/should do/have done 与 did/had done有何区别虚拟语气,对将来的,if they were to do,否定是if they were not to do嘛虚拟语气中had done与would have done,did与would do 的用法有何区别虚拟语气什么时候用should do什么时候用did 虚拟语气if的三种用法英语中的虚拟语气 Sb did/were 之后用什么时态再+would do 在虚拟语气中,should+do 与would+do的区别什么情况下用请详细点