You mustn't speak in class.(改为祈使句)
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Youmustn'tspeakinclass.(改为祈使句)Youmustn'tspeakinclass.(改为祈使句)Youmustn'tspeakinclass.(改为祈使
You mustn't speak in class.(改为祈使句)
You mustn't speak in class.(改为祈使句)
You mustn't speak in class.(改为祈使句)
Please don't speak in class.