根据所给的汉语提示，转换下列句型。
1. Japanese is less important than English.(改为同义句)
Japanese is not ______ important ______ English.
2. Both Li Lei and Xiao Lin are in Grade 9.
Not only Li Lei ______ Xiao Lin ______in Grade 9. (改为同义句)
3. A man sleeps 8 hours per day.(对画线部分提问)
How ______does a man ______ per day?
4. He used to behave badly in class, ______.(改为反意疑问句)
5. Why don't you do that again?(改为同义句)
Why ______ ______ that again?