Unit 4 Don’t eat in class. Section A（Grammar Focus~3c）课件(共17张PPT)

(共17张PPT)
Unit 4 Don’t eat in class.
第二课时 Section A（Grammar Focus~3c）
目录
01
课前预习
02
名师点拨
03
课堂小测
04
课后作业
课前预习
常考短语 1. 在走廊里 ______________
2. 穿校服 __________________
典型句子 3. 不要在过道里跑。
__________ in the hallways.
请同学们预习课本Section A（课本P21）。预习完课本内容，同学们可以试着做以下题目，检测一下自己预习的效果！
in the hallways
wear a uniform
Don’t run
续表
典型句子 4. ——规则是什么？ ——我们必须准时上课。
—__________ are the rules？ —We ______________ on time for class.
5. 我们可以在上课的时候戴帽子吗？
__________ we __________ a hat in class？
6. ——你们必须做什么？ ——我们必须在图书馆里保持安静。
—What do you __________ do？
—We __________________ in the library.
What
must be
Can
wear
have to
have to be quiet
名师点拨
1. 祈使句的概况
(1)定义：用于表达叮嘱、希望、命令、请求、劝告、警告、禁止等的句子叫做祈使句。祈使句通常省略主语you, 以动词原形开头，无时态和数的变化，句末则使用句号或感叹号来表示结束。用委婉的语气表达祈使句时，可在句首或句尾加上please。但如果在句尾加please，那在please之前一定要加一个逗号。
6
祈使句
Grammar Focus
(2)相关口诀：祈使句无主语，主语you常省去； 谓语动词原形当，句首加don’t变否定；朗读应当用降调。
2. 祈使句的类型
祈使句的类型 举例
肯定形式 Do型：动词原形+其他. Open your book，please. 请把你的书本打开。
Let型：Let’s do sth.或Let sb.do sth. Let’s have a rest. 让我们休息一下。
Let me have a look at your new bike. 让我看看你的新自行车。
Be型：Be+形容词. Be careful when driving. 小心驾驶。
续表
祈使句的类型 举例
否定形式 Do型和Be型的否定形式都是在句首加Don’t Don’t ask me about that. 那件事不要问我。
Don’t be silly. 别犯傻了。
Let型的否定式有两种： ①Don’t＋let＋宾语＋动词原形＋其他成分. ②Let＋宾语＋not＋动词原形＋其他成分. Don’t let the children know the reason.＝Let the children not know the reason. 不要让孩子们知道原因。
No＋n./ No＋v.-ing形式。这种形式多用于公共场所的警示语，表示禁止或规劝 No photos！ 禁止拍照！
No smoking！ 禁止吸烟！
续表
祈使句的类型 举例
强调形式 有时为了表示强调，可在肯定祈使句前面加上助动词do，此时的do没有实际意义 Do shut up！ 快住口！
Do be careful. 一定要小心。
专练
( )1. Please __________ the window, Sally. We need some fresh air.
A. open B. opens C. don’t open D. doesn’t open
( )2. __________ more, and you will improve(提高) your speaking skills.
A. To speak B. Speak
C. Speaking D. Don’t speak
A
B
( )3. _____ late for class next time, please.
A. Isn’t B. Doesn’t be
C. Don’t be D. Won’t be
( )4. Tom, __________ so loudly. Your brother is sleeping.
A. not to talk B. not talk
C. doesn’t talk D. don’t talk
C
D
课堂小测
一、根据句意及中文或首字母提示，用单词的适当形式填空
1. Do you have to __________(穿) a uniform at school？
2. We don’t have to come to school e_______ day.
3. She is a friendly girl. She never f_______ with others.
4. I think this is an i__________ book. I want to buy it.
5. We must be __________(安静) in the library.
wear
very
ights
mportant
quiet
二、找出下列句子的错误，并将错误部分在横线上进行更正
6. Don’t swimming in the river.
__________________________________________________
7. He always arrives in school on time.
__________________________________________________
8. The music is great. Everyone wants to listen it again.
__________________________________________________
swimming 改为 swim
in 改为 at
listen改为listen to
9. Our math teacher is very strict with we.
__________________________________________________
10. It’s very important to on time in Germany.
__________________________________________________
we改为 us
to改为to be
三、单项填空（语法专练）
( )11. Tom，__________ the umbrella with you. Look at the clouds. It’s going to rain！
A. taking B. takes C. take D. don’t take
( )12. Please __________ here earlier！ We don’t want to miss the last bus to the library.
A. arrive B. to arrive C. arriving D. arrives
C
A
( )13. —Mom, can I play computer games this evening？
—__________ your homework first.
A. Finishing B. Finish C. To finish D. Finishes
( )14. __________， or you won’t do well in your lessons.
A. Don’t work hard B. Work hard
C. To work hard D. Not work hard
( )15. __________ dressed now! We have to go in ten minutes.
A. Getting B. Get C. To get D. Gets
B
B
B
此部分习题详见独立装订的《课后作业》。请同学们完成《课后作业》Unit 4第二课时的练习题。
课后作业
谢 谢!