被动语态 by 后面做什么语We can’t laugh him.→He can’t be laugh by us.by us 是什么成分?
随意找三句被动语态
We can’t laugh him.→He can’t be laugh by us.
He listens to the radio every day.→The radio is listened to to by him every day.
The nurse is taking care of the sick man.→The sick man is being taken care of by the nurse.
by us,by him,by the nurse 在句中做什么成分?为什么?