当主句是I think,I believe,I suppose,I imagine,I expect时要反问从句,其余句式均反问主句.当这些动词后接的宾语从句的否定转移到主句时,其仍属【否定句】,故其后的简短问句应用肯定式,而非否定式.例如：
I don't believe that he can translate this book,can he?
这里几乎和例子相同,所以也是 can he?