他曾经是位老师、大学校长，他还是内战期间的一名将军。

He had been a teacher, a college President, and a general in the Union army during the Civil War.

youdao

他过去曾经是一个历史老师。

He used to be a history teacher.

youdao

他曾经是位老师吗？

Did he use to be a teacher?

youdao

他曾经是一名老师。

He used to be a teacher.

youdao

查理·史密斯去年退休了，他曾经是我的老师。

Charles Smith, who was my former teacher, retired last year.

youdao

他曾经是我们学校的一位老师。

He used to be a teacher in our school.

youdao

查理·史密斯去年退休了，他曾经是我的老师。

CharlesSmith, who was my former teacher, retired last year.

youdao

查理·史密斯去年退休了，他曾经是我的老师。

Charless Smith, who was my former teacher, retired last year.

youdao

他过去曾经是个老师，但是他现在变成作家了。

He used to be a teacher, but now has turned writer.

youdao

他过去曾经是个老师，但是他现在变成作家了。

He used to be a teacher, but now has turned writer.

youdao