"You must wait to see what happens to me before you drink it."

VOA: special.2009.05.30

You have to practice before it happens.

你要在机会出现之前练习。

想成为明星吗？ - SpeakingMax英语口语达人

You will see all the fish later. This is what happens before it's made into fish sticks.

你待会儿会你看到的全是鱼,鱼变成冻鱼条的过程。

麻省理工公开课 - 媒体、教育、市场课程节选