我认为他一定是疯了，你说是不是？

I think he must be cracked, don't you?

《牛津词典》

不是你疯了，就是我疯了。

Either you are mad or I am.

youdao

不是你疯了，就是我疯了。

Either you or I am mad.

youdao

我想知道你是不是疯了。

I want to know if you are crazy.

youdao

我是不是疯了，如果我梦想有一天你对我比一个朋友意味着更多！

Am I crazy if I dream of a day when you become more to me than just a friend.

youdao

你是不是觉得我疯了？

Is it crazy you think I've gone?

youdao

我知道你在想：“她是不是疯了？”

Now I know you are thinking to yourself, "Is she crazy?"

youdao

我知道你在想：“她是不是疯了？”

Now I know you are thinking to yourself, "Is she crazy?"

youdao