Parents ought to send their children to school.
Children ought to be sent to shool by parents
People think that doing morning exercises is good for health.
It is thought that doing morning exercises is good for health.
Tom is not as tall as Peter.
Peter is taller than Tom
Every day thousands of trees are cut down in the world.
Every day people cut down thousands of trees in the world
Parents ought to send their children to school.
Children ought to be sent to school
People think that doing morning exercises is good for health.
It is good for health to do morning exercises
Tom is not as tall as Peter.
Peter is taller than Tom
Every day thousands of trees are cut down in the world.
Every day people cut down thousands of trees in the world