(hot)
Hanoi is hotter than Ho Chi Minh city.
(fast)
The cheetah is faster than the mouse.
(fast)
Airplane is the fastest vehicle.
(big)
The U.S.A is bigger than Vietnam
(hot)
Hanoi is the hottest city.
(small)
The kitten is smaller than the cat.
(tall)
Chelsea is the tallest person.
(funny)
Johnny is the funniest boy.