or else

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

快点, 要不然就来不及。

He must be teasing,or else he’s mad.

他一定是在开玩笑,不然他就是。

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

不但是我心里话，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."

"不要碰油,否则会橡胶鞋弄坏。"

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

必须努力学习, 不然话, 英语考试不会及格。