or else

Make haste, or (else) you'll be late.

快点, 要就来。

He must be teasing,or else he’s mad.

他一定是在开玩笑,他就是疯。

And from my soul too; Or else beshrew them both.

那但是我心里话，也是我灵魂里话；倘有虚假，让我灵魂下地狱。

"Keep off oil, or else it will perish your rubber boots."

"要碰油,否则会把你橡胶鞋弄坏。"

You must study harder (or) else you'll fail in the English examination.

你必须努力学习, 话, 英语考试会格。