must they dust the room?的否定回答是什么?
must they dust the room?的否定回答是什么?
Must they dust the room肯定回答
they must dust the room
they must dust the room变成一般疑问句
must I 的否定回答形式是什么?
must的否定回答
Must I clean the room now (作否定回答) No,you _____ _______ _____
------Must I clean the room? 的肯定回答
They are cleaning the room .改为一般疑问句并作否定回答
Must I finish the work today?的否定回答
They played football in the playground的否定、一般和肯否回答是什么
must I follow the rules否定回答