你请别人过来说:
Please come here.
你请别人打开电灯时说:Turn on the light,please.
你请别人不要践踏草坪时说:Don't walk on grass!
你叫别人不要躺在床上看书时说”Don't read on the bed!
你建议咱们一起做游戏时说“Let's play a game,shall we?
你建议咱们课堂上不要讲话时说:Don't make any noise in class!
令:祈使句Don“t 后跟什么?Don't + 动词原形.