boy and ...?
boy and girl
big and ...?
big and small
tall and ...?
tall and short.
day and ...?
day and night.
cold and ...?
cold and hot.
go and ...?
go and stop.
laugh and ...?
laugh and cry
front and ...?
front and back.
hard and ...?
hard and soft.
fast and ...?
fast and slow.
full and ...?
full and empty.
near and ...?
near and far.
closed and ...?
closed and open
top and ...?
top and bottom.
up and ...?
up and down.
sweet and ...?
sweet and sour.
happy and ...?
happy and sad.
... and small.
big and small.