I don't believe this is right.改为反义疑问句

I don't believe this is right.改为反义疑问句
I don't believe this is right.改为反义疑问句

I don't believe this is right.改为反义疑问句
I don't believe this is right.=I believe this isn't right.
然后改成：I don't believe this is right,isn't it?

I don't believe this is right,isn't this?

I don't believe this is right,do I ?