17 祈使句：
· 第二人稱：
let 其他人稱代詞
· 祈使句的否定，加don’t
· 反意疑問
祈使句（第二人稱）
祈使句表示請求，命令，建議，邀請等，謂語動詞一律用原型，句子中通常不用主語，句末用驚嘆好或者句號，用降調(diào)。
★肯定句 動詞原型
例， Come here, please. Go downstairs, please. Stand up. Sit down. Be quiet. Be careful.
祈使句中如果有喚語，一定要用逗號隔開，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 動詞原型
Don't come here.
Don’t sit down.
Don’t stand up.
Don’t give me it.
let sb. do
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?
· 第二人稱：
let 其他人稱代詞
· 祈使句的否定，加don’t
· 反意疑問
祈使句（第二人稱）
祈使句表示請求，命令，建議，邀請等，謂語動詞一律用原型，句子中通常不用主語，句末用驚嘆好或者句號，用降調(diào)。
★肯定句 動詞原型
例， Come here, please. Go downstairs, please. Stand up. Sit down. Be quiet. Be careful.
祈使句中如果有喚語，一定要用逗號隔開，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 動詞原型
Don't come here.
Don’t sit down.
Don’t stand up.
Don’t give me it.
let sb. do
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?