My backpack is (heavy) than your backpack.
heavier
The Great Wall of China is one of the (long) structures ever built.
longest
This is the (comfortable) chair in the entire house.
most comfortable
The test was (difficult) than we had expected.
more difficult
The weather today is much (bad) than it was last week.
worse
My new car is (expensive) than my old one, but it's worth it.
more expensive
Mount Everest is the (high) mountain in the world.
highest
My brother is much (tall) than me, so he can reach the top shelf.
taller
She thinks that sci-fi movies are (interesting) than comedies.
more interesting
My dog is much (happy) when he is playing in the park.
happier
He told a (funny) joke than the one I heard last night.
funnier
The blue whale is the (large) animal on Earth.
largest
He is the (good) student in the entire class.
best
He is much (lazy) on weekends than during the week.
lazier
He is the (friendly) person in the neighborhood.
friendliest
Today's math homework was (easy) than yesterday's.
easier