Unit1InChina,??’‘’,,wemustn’tdoanycleaningonthefirstdayoftheSpringFestival.().().().().().().().().()Let’'t/can’;;;;……;Needn’:②表示推测“肯定,一定”:①表示义务、必要或命令(必须):eearlytomorrow.---MustIfinishmyhomeworkfirst?.---Yes,youmust.---No,youdon'thaveto/needn't.{must(必须)注意must开头的疑问句,其否定回答通常用don‘thaveto或needn’t。mustn't(禁止)③否定时表示“禁止”:Youmustn’
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