Is this sentence correct?
我在看我的朋友完游戏。
Wo zai kan wo de pengyou wan youxi

I am watching my friend play video games

Question

Is this sentence correct?
我在看我的朋友完游戏。
Wo zai kan wo de pengyou wan youxi

I am watching my friend play video games

Answer

This sentence is almost right. The only mistake is “完”。  
完 means finish, the end. 
The right character you should use is 玩， which means play.

Answer

Yes, your sentence is correct! Good job :)

Answer

must be
我  在  看  我的  朋友  玩  电视游戏。