英语中有些词语，用在特殊疑问词或特殊疑问词修饰的名词之后，加强句子语气，意为“究竟；到底”，这些词语是：

in God's name,

in Heaven's name,

on earth,（不是on the earth）

in the world,

the hell,

in hell

What on earth are you doing now? 

你究竟在干什么?

What in God 's name was that huge bang ?

究竟是什么砰的一声响？

What in Heaven's name are you doing?

你到底是在干什么！

Who in the world is that man taking to your wife?

和你老婆说话的那个人究竟是谁？

You searched the rooms one by one like this. When on earth can you find it?

你这样一个房间一个房间地找，什么时候能找到啊？

Where the hell were we going?

我们这是要到哪里去？