◆ ... the heck (e.g. "what the heck?"),... in the world (e.g. "why in the world?"),... on earth (e.g. "who on earth?")
一体全体問題は何か。
What on earth is the problem?
一体全体何故君がここにいるのだ?
Why on earth are you here?
あなたは一体全体何をしているんですか。
What on earth are you doing?