Mr Knight cannot be here, so his wife will accept the prize on his behalf.

奈特先生不能来，因此由他的夫人代他领奖。

My husband could not be here tonight, but I want to thank you on his behalf.

我丈夫今晚因故不能前来， 我谨代表他向你们致谢。

They lobbied the government on his behalf and he was granted a presidential pardon.

他们为他游说政府，他因之得到了总统特赦。

I shall accept the prize on his behalf.

我将代表他接受那份奖金。

As the manager was ill, his assistant spoke on his behalf.

经理病了，经理助理代他在会上发言。