作业帮 > 英语 > 作业

must变否定是什么,变一般疑问句是什么?

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:2024/05/16 02:09:42
must变否定是什么,变一般疑问句是什么?
1,must做比须时,否定是must not或mustn't;表示推测时,通常与be连用,否定用can't be
2,must做比须时,反义疑问句用mustn't;如You must obey the school rules,mustn't you?
表示推测时,要用be或助动词do的相应时态;如:Tom must be in the school room now,isn't he?
Tom must have arrived yesterday,didn't he?