(-) smoke
Don't smoke!
(+) sit / down
Sit down!
(-) eat or drink
Don't eat or drink
(-) turn it / off
Don't turn it off.
(+) Vegetables
Eat vegetables.
(+) stand / up
Stand up!
(-) take / photos
Don't take photos!
(+) wash / your hands
Wash your hands!
(-) listen to/ her
Don't listen to her.
(+) wake up / at 6 am
Wake up at 6 am.
(-) throw / rubbish / on the floor
Don't throw rubbish on the floor!
(-) cross / the street
Don't cross the street.
(+) come / in
Come in
(-) step on / the grass
Don't step on the grass!
(+) be / quiet
Be quiet!