Mary (don't / doesn't) have a blue shirt.
DOESN'T
My friend (don't / doesn't) have a blue hat.
DOESN'T
We (don't / doesn't) have a pencil.
DON'T
We (don't / doesn't) have a blue car.
DON'T
He (don't / doesn't) have brown socks.
DOESN'T
They (don't / doesn't) have a camera.
DON'T
He (don't / doesn't) have shorts.
DOESN'T
They (don't / doesn't) have any dogs.
DON'T
I (don't / doesn't) have an apple.
DON'T
My mum (don't / doesn't) have a green bag.
DOESN'T
Tom (don't / doesn't) have a red T-shirt.
DOESN'T
My cousin (don't / doesn't) have a pencil case.
DOESN'T