Translate the following sentence into English.还是个MBA学生的时候，他就在打工，

Translate the following sentence into English.

还是个MBA学生的时候，他就在打工，学习如何经营一家公司。

​WHEN HE WAS AN MBA STUDENT, HE HAD ALREADY BEGUN TO WORK TO LEARN HOW TO RUN A COMPANY.

考点：经营一家公司run a company；还是...的时候即当...的时候用when引导时间状语从句。