01. The doctor amputated the leg after it had become infected with a flesh eating bacteria.
The leg was amputated by the doctor after it had become infected with a flesh eating bacteria. .
02. Henry has eaten all the cupcakes.
All the cupcakes have been eaten by Henry
03. The nurse laid the fragile, premature baby into the incubator very carefully.
The fragile, premature baby was laid into the incubator very carefully by the nurse
04. Lily would solve the problem quite quickly.
The problem would be solved quite quickly by Lilly.