✓
I have a lunchbox.
✓
I have a drink.
✗
I don't have a sandwich.
✓
I have (three) bananas.
✗
I don't have (two) lunchboxes.
✗
I don't have (three) drinks.
✓
I have sandwiches.
✗
I don't have a banana.
✓
I have grapes.
✗
I don't have a tomato.
✓
I have tomatoes.
✗
I don't have a pear.
✓
I have (two) pears.
✓
I have a cookie.
✗
I don't have (three) cookies.
✗
I don't have an orange.
