must变否定是什么,变一般疑问句是什么?

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must变否定是什么,变一般疑问句是什么?
must变否定是什么,变一般疑问句是什么?

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?

must变否定句,只需要在 must 后面直接加not ,变为 must not 缩写为mustn't;
变疑问句,直接将must提到句首说错了,是变否定和反义疑问当陈述部分有情态动词must,问句有4种情况:
(1)mustn't表示“禁止,不可,不必”时,附加问句通常要用must.
You mustn't stop your car here,must you?

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must变否定句,只需要在 must 后面直接加not ,变为 must not 缩写为mustn't;
变疑问句,直接将must提到句首

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Must变否定直接加not,
变一般疑问Must提至句首,回答Must或Don't have to

否定是must not 吧