Apart from english, he have a good command of russian.
除英语外,他也精通俄语.
I command that he go at once.
我命令他立即就去.
I command you to start at once.
我命令你立即动身.

I request you to buy some drinks for us.
They requested that (the book I borrowed should be returned) by next Friday.
(求给最佳答案）