He reminded me of what I should otherwise have forgotten.

亏他提醒我, 我就忘了。

Don’t go too far afield or you’ll get lost.

别走得太远, 你会迷路的。

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

快点, 就来及了。

Make haste, or we shall miss the train.

快一点, 我就赶火车了。

Prices seem to have stopped rising in the shops, or is that just wishful thinking on my part?

商店里东西的价格好像再涨了，就是我的一廂情愿？