We use imperatives to give orders or advice. There are positive and negative imperatives. the base form of a verb in a We use _______________ 【positive （肯定）/negative（否定）】 imperative.
Be quiet, please. (Please be quiet.) 请安静。（表请求）
3. 肯定结构： ① Do型 (即：动词原形+宾语+其他成分)。 Please have a seat here. 请这边坐。 有的祈使句在意思明确的情况下，动词可以省略。 This way, please. = Go this way, please. 请这边走。 ② Be型 （即：Be+表语+其他成分）。 Be a good boy! 要做一个好孩子! ③Let型（即：Let+宾语+动词原形+其他成分）。 Let me help you .让我来帮你。
Close the door, Rose.
Speak louder, Jane.
Don’t sleep in class, James. Turn to page 74, Steven.
Don’t bring pets to school, Mary.
单项选择 1. If you are tired, ______ a rest.
In a (positive/negative)imperative, we use don’t before the base form of the verb. _________
Grammar exercise
Look at the picture. What will the teacher say? Make sentences with the words from the box on page 95. Some of them must begin with Don’t.
Unit 7
Poems
Grammar
Imperatives
本课呈现语法点：
Open the door, Daisy.
Don’t open the door, Daisy.
Let’s make a million smiles! Be quiet, girls. Don’t be late again.
6. Please ______ me some money, will you?
C. to lend
D.bout to begin. Please
______ seated.
A. be B. are
C. is later.
A. Keep
D. being
8. _____ the boxes. You may use them B. Keeping
C. To keep
D. Kept
将以下祈使句改为否定式。 1. Come here early. Don’t come here early. 2. Please wait for her. Please don’t wait for her. 3. Read the book carefully. Don’t read the book carefully.
祈使句（Imperative Sentence）
1.定义：祈使句是用来表达命令、请求、劝告、警告、
禁止的句子。祈使句最常用于表达请求、命令。
2. 结构如下：
肯定：(Please) V. + O…
否定：(Please) Don’t ＋V. + O…
Go and wash your hands.
去洗你的手。（表命令）
Don’t let him go. = Let him not go.
别让他走。
③有些祈使句可用no开头，用来表示禁止。
No smoking! 禁止吸烟！= Don’t smoke .
No fishing! 禁止钓鱼！ = Don’t fish.
5.比较 下面两个句子： Let’s…, shall we/shan’t we? Let us…,will you/won’t you? Let’s have a rest , shall we ? Let us have a rest , will you ? 6. 祈使句在反义疑问句中，一般加will you 或 won’t you. ( shall we或 shan’t we 【 在let’s句型中】) Don’t interrupt me, will you? Yes, I will . Read the text aloud ,will you ? No , I won’t .
4. _____ up early tomorrow, or you A. Getting
C. To get
B. Get
D. Got
5. _____ in the street. It’s dangerous.
A. Not play C. Don’t play A. lend B. Not to play D. Don’t to play B. lending
4. 否定结构： ① Do 型和Be型的否定式都在句首加don’t构成。 Don’t forget me! 不要忘记我！ Don’t be late for school! 上学不要迟到! ② Let型的否定式有两种： “Don’t＋let+宾语+动词原形+其他成分”
“Let+宾语+not+动词原形+其他成分” 。
A. have
C. to have A. Do let
B. having
D. had B. Let do
2. ______ me go. It is very important for me. C. Doing let D. To do let
3. He is not honest. ______ believe him. A. Not C. To not can’t catch the train. B. Don’t D. Not to