Change the sentences.坐等回答,加几个字

Change the sentences.坐等回答,加几个字
1.Why don't you do your homework first?(同义句)
Why ____ ____ do your homework first?
2.His bike isn't the same as mine.(同义句)
His bike ____ ____ ____ mine.
3.Maybe you are right this time.(同义句)
You ____ ____ right this time .
4.I hope so.(反义句)
I ____ ____.