I am often written by him.

He made me do the work. (Passive) = I was made to do the work by him

He leads a most unhappy life.

He knows swim.

= He knows how to swim.

He killed a bird. (Passive) 

= A bird was killed by him.

He joined the office after he had got the appointment letter.

He is an Μ. Α

He is an engineer.

He is an engineer.

He is a one eyed man.

He is a MBBS.

He is weak not only in English but also in Bengali.

He is weak in ​Mathematics.

He is suffering with fever. = He is suffering from fever.

He is punished by himself=He was punished.