祈使句 you must't letter here 然后是don't you 还是are't you?简便回答就可以了谢

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祈使句 you must't letter here 然后是don't you 还是are't you?简便回答就可以了谢

祈使句 you must't letter here 然后是don't you 还是are't you?简便回答就可以了谢
祈使句 you must't letter here 然后是don't you 还是are't you?
简便回答就可以了

祈使句 you must't letter here 然后是don't you 还是are't you?简便回答就可以了谢
陈述句含有情态动词must有两种情况:
must表示“必须”,反意疑问句部分为mustn’t…? / needn’t…?
He must study hard at English, mustn’t he? / needn’t he?
You must go home now, needn’t you? / mustn’t you?
We mustn’t be late, must we ?
Must表示推测:“一定,肯定” 反意疑问句部分与must后面的动词呼应
You must be joking, aren’t you?
He must be ill, isn’t he ?
注意:用must对过去的动作推测时,反意疑问句部分的助动词用did或have, 而对过去的状态推测,反意疑问句部分的be动词用was:
She must have finished her work, hasn’t she ? / didn’t she ?
Jack must have arrived here yesterday, didn’t he ?
He must have been a policeman, wasn’t he ?