the boy is ten years old
=he is a ten year old boy.
he went to school although it rained heavily
=in spite of heavy rain, he went to school
tom is so intelligent that he always gets good marks
=tom is such intelligent student that he always gets good marks
the film which was shown on TV last night is very exciting
=the film shown on TV last night is very exciting
they say the doctor has made a serious mistake
=the doctor is said to have made a serious mistake
i prefer tennis to football
=i'd rather tennis than football
you shouldn't drive your car fast
=i advise you not to drive your car fast.