我先舉個例子的英文

Let me give you an example

先───before;例子───example

This year's yield of wheat is higher than ever before.───今年小麥產量高于往年.

She'd never done Pilates before.───她以前從未做過普拉提。

The stew must be boiled up before serving.───燉肉必須煮熟才能上桌.

Be sure to bar all the doors before you leave.───在離開前,務必把所有的門都閂上.

The idea of flight had been kicking around for centuries before man actually achieved it.───在人們真正能上天飛行之前,飛行這種想法早已存在數百年了.

We should prevent others cashing in before we've time to market the product.───我們應該防止別人在我們沒有來得及在市場上銷售這產品之前大撈一筆.

A vast expanse of golden crops lay before us.───我們眼前展現出一大片金黃色的莊稼.

I had a medical checkup before going abroad.───我在出國前作了一次體格檢查.