英语翻译：难道

Is it possible that...;
Could it be said that...

Don't you....?

on earth

Should it be that ...

最好要有上下文 结合语境翻译是最好的

所有否定疑问句都可以翻译成 难道。
isn't .......?
can't ....?
doesn't....?
don't.....?
之类