I've bumped my knee on the wall.

我的膝盖撞上了墙壁。

youdao

I've bumped my knee against (on) the wall.

我的膝盖撞到了墙上。

youdao

I knocked the wall and hurt my knee.

我撞到了墙上把膝盖伤了。

youdao

I knocked the wall and hurt my knee.

我撞到了墙上把膝盖伤了。

youdao