他曾经是名教习，在那所小学教数学。

He used to be a teacher of maths in that primary school.

youdao

她教数学，也曾经是我的老师。

She teaches math and she was once my teacher, too.

youdao

我的爸爸过去曾经是一名数学老师。

My father used to be a math teacher.

youdao

我的爸爸过去曾经是一名数学老师。

My father used to be a math teacher.

youdao