Brush your teeth before bed. (affirmative)Don't forget to turn off the lights when you leave. (negative)Please clean up your room before going out. (affirmative)Don't touch the hot stove. (negative)Be sure to lock the door when you're not home. (affirmative)Don't talk with your mouth full. (negative)Please remember to feed the cat while we're away. (affirmative)Don't play with matches. (negative)