I was going to school when this happened.

我上学的时候，发生了这件事。

youdao

When I was going to school this morning, I saw a car run into a bus.

当我今天早上上学的时候，看到一辆小汽车和公交车相撞了。

youdao

When I was going to school and learning the things I know today, that was the best time of my life.

上学时，我学到了许多知识，至今仍然有用，那是我人生中最美好的时光。

youdao

"Early in our marriage my wife came she was going to school and working late and driving home, so I baked a cake.

VOA: special.2010.02.08

I just needed one more credit hour when I was going to school,

我上学的时候就差一个学分，

攀岩的刺激 - SpeakingMax英语口语达人

My roommate for many years was going to medical school as I was going to graduate school, and we found we had so many interesting conversations about chemistry -- her from the context of practicing and using medications and talking about how they worked on a molecular level, and me talking about my research.

让你们读医学预科的人都转行,我多年的室友在我去读研究生的时候，去了医学院,我发现我们对于化学有过很多有趣的交谈,她会说如何应用药物,如何在分子层面上让它们工作，我则说关于我的研究。

麻省理工公开课 - 化学原理课程节选

"I was going to school and I suddenly get pregnant, " his daughter tells Sorie and Foday.

BBC: Sierra Leone's school-time blues

By that time, I think the principal knew that if I was not hired, I was going to be at the school anyway.

WHITEHOUSE: Fostering a School and Home Connection

During this time I was able to contact the school and let them know I was going to be gone for some time.

FORBES: For-Profit Colleges Are Not The Problem, State Schools Are