Don't be late. Don't bother me now. Don't shout. Don't yell. Don't scream. Don't litter. Don't be rude. Don't drop out of school. Don't talk while you eat. Don't make a mess. Don't talk so loud. Don't fight with your brother. Don't worry. Don't give up. Don't eat that. Don't talk to strangers. Don't play with matches. Don't play with fire.