-s
an apple
two apples
a box
two boxes
a lolly
two lorries
two feet
a pen
two pens
a witch
two witches
a lorry
two lorries
a child
two children
a book
two books
a dress
two dresses
a tummy
two tummies
a tooth
two teeth
a lamp
two lamps
a watch
two watches
a city
two cities
a mouse
two mice
a chair
two chairs
a bus
two buses
a baby
two babies
a man
two men