or else

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

快点, 要不然来不及了。

He must be teasing,or else he’s mad.

他一定在开玩笑,不然他了。

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

那不但我心里话，也我灵魂里话；倘有虚假，让我灵魂下地狱。

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

"不要碰油,否则会把你鞋弄坏。"

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

你必须努力学习, 不然话, 英语考试不会及格。