I am a junior school student.

我是一名初中生。

My children go to a junior school.

我的孩子们上了小学。

My son's at junior school.

我儿子在上小学。

My years in junior school life ended.

我这些年的初中生活结束了。

Helli: Oh please! We did that in junior school.

噢，算了！我们在初中就那样做了。