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，句末用惊叹号或者句号，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？endprint