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