All eyes were focused on the speaker 为什么用被动?

请问All eyes were focused on him 为什么要用被动? all eyes were focused on her when she entered the hall in a all eyes are focused on me 请问eye有视线的意思吗?字典里查不到.为什么用被动呢? with his eyes focused on中为什么要用focused,而不是用focusing be focused on是focused on的被动语态么? be focused on这里的focused是被动语态吗? all eyes were on the TV when the screen suddenly became blac He sat there,with his mind focused on his work中为什么用focused不用 her eyes were fixed on her plate.这里.为什么是被动,眼睛肯定是主动看的 The workers were made to work on the farm为什么用to 这个被动语句 请用初二的 All the evening dresses were beautiful.为什么要用were All the food were on the table.