Somebody has learned lessons.
Lessons have been learned
Somebody has cleaned the kitchen.
The kitchen has been cleaned
Somebody has killed the President.
The President has been killed
Somebody has sent the email.
The email has been sent
Somebody has taken the money.
The money has been taken
Somebody has repaired the road.
The road has been repaired
Somebody has eaten the strawberries.
The strawberries have been eaten
Somebody has ordered new books.
New books have been ordered
Somebody has fired John.
John has been fired
Somebody has watered the plants.
The plants have been watered
Somebody has bought the presents.
The presents have been bought
Somebody has made coffee.
Coffee has been made