B. Stop when the light is red.
C. Turn right.
D. Don't park here.
E. Be careful!
F. Don't play on the street.
祈使句表示请求、命令、建议,句子通常不带主语,谓语动词用原形。肯定形式一般以动词原形开头,其否定形式是在谓语动词前加do not或don’t。
祈使句