chuyển số ít sang số nhìu
an architecture - architectures
an umbrella - umbrellas
an ox - oxen
a baby - babies
a woman - women
a child - children
an ant - ants
a half- halves
a life - lives
a key - keys
an ink - inks
a goose - geese
a play - plays
a boss - bosses
an interting book - interesting books
a good teach - good teachers
an expensive pen - expensive pens
an intelligent student - intelligent students