Translation of "Portrait" in Chinese

There is a portrait of Bob on the wall.

牆上掛著 Bob 的肖像畫。

A portrait of an old man was hanging on the wall.

一张老人的画像挂在墙上。

A friend of mine commissioned a well-known artist to paint a portrait of his wife.

我的一个朋友委托一位知名画家给他的妻子画肖像。