祈使句用法详解：表警告或威胁
■典型例句
Don’t be rude. 不要无礼。
Don’t you speak to me like that! 你别这样跟我讲话!
Stir, and you are a dead man. 动一下就要你的命。
Never speak to me like that again. 决不要再那个样子跟我说话。
Put that down, or else I’ll smack you. 把它放下来，不然我会揍你。
Do that again and I’ll call a policeman. 你再这样做我就要叫警察了。
Fail to pay and they’ll cut off the electricity. 你如果不付款，他们就要断电。