Mettre les phrases à la voix passive; exprimer le complément d'agent Merci

1- This house is haunted by a ghost.
by a ghost : le complément d’agent.

2- He was followed by two policemen.
by two policemen : le complément d’agent


3- This bridge was built by the Romans a long time ago.
by the Romans : le complément d’agent

4- All these books have been written by my friend.
by my friend : le complément d’agent.

5- America was discovered by C.Columbus in 1492.
by C.Columbus : le complément d’agent

6- He was killed by the Germans during the war.
by the Germans : le complément d’agent.

7- It will be posted by my uncle next
by my uncle : le complément d’agent

8- This film is directed by a French producer.
by a French producer : le complément d’agent

voilaaaa!!!!