我过去是老师；i worked as a guide during the university holidays。

I was a teacher.; I worked as a guide during the university holidays.

youdao

他过去是位教盲人的老师。

He was a teacher of the blind.

《柯林斯英汉双解大词典》

回首过去，我是无论如何都不想改变九年级的经历的，因为那时我从朋友以及老师和领导的偏见中学会了人生许多大道理。

In retrospect, I wouldn't change my ninth grade experience, because I learned many of life 's important lessons from my friends and the ignorance of teachers and administrators.

youdao