学位英语语法归知识点纳：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：Don't+动词原型

Don't come here.

Don't sit down.

Don't stand up.

Don't give me it.

let sb. do 让某人做

Let me pass.

Let us have a rest.

Let's have a rest.

反意疑问：

Let's have a walk along the river, shall we?

Let us go out for a drink, will you?