The plumber fixed the leak.
The musician had composed a new song.
The author will write a novel.
The engineer has designed the bridge.
The manager will approve the request.
The scientist discovered a new element.
The artist is painting a portrait.
The cat chased the mouse.
The chef cooks the meal.
The teacher explains the lesson.
The mouse was chased by the cat.
A new song had been composed by the musician.
A new element was discovered by the scientist.
A novel will be written by the author.
The meal is cooked by the chef.
The bridge has been designed by the engineer.
The leak was fixed by the plumber.
The lesson is explained by the teacher.
The request will be approved by the manager.
A portrait is being painted by the artist.