1. he had to clean the bedroom yesterday(改否定句,一般疑问句 ）2.he had to （clean the bedroom yesterday）（划线（括号里的）部分提问） 3.he had to clean（ the bedroom yesterday ）（划线部分提问）
问题描述：
1. he had to clean the bedroom yesterday(改否定句,一般疑问句 ）
2.he had to （clean the bedroom yesterday）（划线（括号里的）部分提问）
3.he had to clean（ the bedroom yesterday ）（划线部分提问）
答
hadn‘t he to clean the bedroom yesterday
what had he to do
where had he to clean
答
He didn't have to clean the bedroom yesterday.
Did he have to clean the bedroom yesterday?
What did he have to do?
What did he have to clean?