问题标题:
Youmustturnoffyourcellphonewhenyoutakeaplane.改为否定形式的同义句You....yourcellphonewhenyoutakeaplane.为什么
问题描述:
Youmustturnoffyourcellphonewhenyoutakeaplane.改为否定形式的同义句
You....yourcellphonewhenyoutakeaplane.为什么
黄冬明回答:
保证答案准确率:=You(neednotturnoff)yourcellphonewhenyoutakeaplane.must解释为“必须”时,其否定形式一般为needn't,意思是“不必”.mustn't的意思是“禁止,不许”,不符合句意.如果对你有所帮助,请...