They have to sleep before ten.(变为否定句,一般疑问句并作否定回答)
问题描述:
They have to sleep before ten.(变为否定句,一般疑问句并作否定回答)
答
They do not have to sleep before ten.
They have to sleep before ten.(变为否定句,一般疑问句并作否定回答)
They do not have to sleep before ten.