You are supposed to shake hands.怎么变疑问句啊
问题描述：
You are supposed to shake hands.怎么变疑问句啊
答
Are you suppposed to shake hands?
be supposed to do sth(应该做某事）
变法把be动词提前就行了
答
一般疑问句：Are you supposed to shake hands?
对人称提问的特殊疑问句：Who are supposed to shake hands?
对事件提问的特殊疑问句：What are you supposed to do?
答
Are you supposed to shake hands?
Who are supposed to shake hands?
What are you supposed to do?