求助一题反义疑问句(初二)Chemical factories mustn't ler out dirty water into rivers,_____ ____?请问下这是祈使句不?是will they呢,还是must they?

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求助一题反义疑问句(初二)Chemical factories mustn't ler out dirty water into rivers,_____ ____?请问下这是祈使句不?是will they呢,还是must they?

求助一题反义疑问句(初二)Chemical factories mustn't ler out dirty water into rivers,_____ ____?请问下这是祈使句不?是will they呢,还是must they?
求助一题反义疑问句(初二)
Chemical factories mustn't ler out dirty water into rivers,_____ ____?
请问下这是祈使句不?是will they呢,还是must they?

求助一题反义疑问句(初二)Chemical factories mustn't ler out dirty water into rivers,_____ ____?请问下这是祈使句不?是will they呢,还是must they?
must they 记住这样就行了除祈使句,一般情况下,反义疑问句都是跟主语动词相反

will they

用must或may
当mustn’t表示“禁止、不许”时, 其反意疑问句可用may或must构成。
例如:——We mustn’t be late for the meeting, must/may we?
——No, we mustn’t/may not

不是祈使句,祈使句开头不可能有主语(Chemical factories)
应该选must they.
祈使句一般开头是动词.don.don't一类的