couldn't 和 shouldn't

来源：学生作业帮编辑：作业帮分类：英语作业时间：2024/05/22 17:50:26

couldn't 和 shouldn't
4.He__ the 8:20 bus because he didn't leave home till 8:25.
A couldn't have caught B ought to have caught C shouldn't have caught D must not have caught
为什么选C,A哪里不妥,谢谢!
问题补充：那为什么
She must be in the dormitory now.
No, she __ be there. I saw her in the classroom a minute ago.
A mustn't B can't C couldn't D wouldn't可以选B呢?是不是如果有shouldn't的话答案就是shouldn't了呢?

问题补充的那个考的是可能性的问题
must太绝对
问题的 shouldn't have caught 在这里有委婉责备的特定用法,更符合情景

couldn't 和shouldn't 区别, couldn't和shouldn't的区别,急要 should have done和shouldn't have done,couldn't have 用could,should,couldn't,shouldn't填空 can't和couldn't couldn t和 should 和 shouldn't 分别+ shan't和shouldn't 的区别 must/should/shouldn't/needn't/could/couldn't/may/mought+have Shan't / shouldn't didn't 和couldn't的区别, 用should和shouldn`t造句