My exercise is more difficult than your.

Eragon is not as interesting as Harry Potter.

Trip to Tibet was the most interesting trip in my life.

This is the most boring movie I ever watch.
Silver is cheaper than gold.
English is the best subject at school.
Bungee jumping is the most exciting extreme sports.
Chris Rock is the funniest actor.
I am the biggest boy/girl in our class.
The hatchback is safer than the sports car.
Doda/50 Cent is worse than Lady Gaga/Eminem.
Math is the most difficult school subject.
Play cards is more boring than play chess.
Play volleyball is more interesting than play basketball.