新概念英语第一册语法总结：祈使句祈使句表示请求、命令、建议、邀请等，谓语动词一律用原型，句子中通常不用主语，句末用惊叹好或者句号，用降调。肯定句：动词原型Come here, please.Go downstairs, please.Stand up.Sit down.Be quiet.Be careful.祈使句中如果有唤语，一定要用逗号隔开，放在句首或者句尾：Come in, Amy.Sit down here, Tom.Mary, give me a book please.否定：Dont+动词原型Dont come here.Dont sit down.Dont stand up.Dont give me it.let sb. do 让某人做Let me pass.Let us have a rest.Lets have a rest.反意疑问：Lets have a walk along the river, shall we?Let us go out for a drink, will you?
