學(xué)位英語(yǔ)語(yǔ)法歸知識(shí)點(diǎn)納：祈使句

祈使句表示請(qǐng)求、命令、建議、邀請(qǐng)等，謂語(yǔ)動(dòng)詞一律用原型，句子中通常不用主語(yǔ)，句末用驚嘆好或者句號(hào)，用降調(diào)。

★肯定句：動(dòng)詞原型

Come here, please.

Go downstairs, please.

Stand up.

Sit down.

Be quiet.

Be careful.

祈使句中如果有喚語(yǔ)，一定要用逗號(hào)隔開，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+動(dòng)詞原型

Don't come here.

Don't sit down.

Don't stand up.

Don't give me it.

let sb. do 讓某人做

Let me pass.

Let us have a rest.

Let's have a rest.

反意疑問：

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

Let us go out for a drink, will you?