since I found out clowns were just people with makeup.我發現小丑不過是人化妝扮成的開始的

find out發現；找出來；揭發

You can find out many advantages in urban life.

你會發現都市生活中有許多便利之處。

I am trying to find out experience in teaching.

我在摸索教學經驗。

Um, as a matter of fact, by the time I was a teenager,實際上，當我成長為小少年的時候

as a matter of fact事實上

As a matter of fact, I've never been there before.

事實上我從未到過那兒。

As a matter of fact, light is a form of energy.

其實，光是能的一種形式。

by the time到…時候

By the time we arrived the meeting was over.

我們到達時，會議已結束了。

The party was wellnigh over by the time we arrived.

我們到達時，聚會差不多快結束了。