This bag is ... than that one. (big)
This bag is bigger than that one. (big)
Which one is the ...? (good)
Which one is the best? (good)
These shoes are ... than mine. (comfortable)
These shoes are more comfortable than mine. (comfortable)
This is the ... camera in the store. (cheap)
This is the cheapest camera in the store. (cheap)
This coat is ... . (warm)
This coat is warmer. (warm)
It's in the ... neighborhood. (bad)
It's in the worst neighborhood. (bad)
My suitcase is ... than yours. (heavy)
My suitcase is heavier than yours. (heavy)
This is the ... hotel in town. (popular)
This is the most popular hotel in town. (popular)
The hotel is ... than the other one. (expensive)
The hotel is more expensive than the other one. (expensive)
That is the ... suitcase of all. (big)
That is the biggest suitcase of all. (big)