之前

明天下午之前我会把它完成。

明天下午之前我會把它完成。

I will finish it by tomorrow afternoon.

你回来之前我已经走了。

你回來之前我已經走了。

I had already left before you returned.

在我去荷兰之前，我从没见过风车。

在我去荷蘭之前，我從沒見過風車。

I had never seen a windmill until I visited the Netherlands.

你觉得我之前在做什么？

你覺得我之前在做什麼？

What do you think I've been doing?

你觉得我之前在做什么？

你覺得我之前在做什麼？

What do you think I was doing before?