Change the voice : He was watching T.V.
AT.V must be watched by him.
BT.V will be watched by him.
CT.V should watch by him.
DT.V was being watched by him
AT.V must be watched by him.
BT.V will be watched by him.
CT.V should watch by him.
DT.V was being watched by him
Related Questions:
Change into Passive Voice:-
The teacher made him repeat his work.