人教版七年级下册英语Unit4 Don't eat in class Section A Grammar Fous课件（24张）

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Unit 4
Don’t eat in class!
Section A
Grammar Focus

Nothing can be accomplished without norms or standards.
不以规矩，不能成方圆
——孟子《离娄章句上》

Living in the society
We have to
We can’t
obey rules.（遵守规则）
break rules.（违反规则）
1. Don’t arrive late for class.
2. Don’t run in the hallways.
3. Don’t eat in the classrooms.
4. Don’t listen to music in the
classrooms or the hallways.
5. Don’t fight.
School Rules
语法讲解----祈使句
一.祈使句是表示请求、命令、叮嘱、号召、
劝告等的句子; 通常省略主语you; 句中谓语
动词用动词原形; 句尾一般用降调; 祈使句的
开头是动词原形。
祈使句有肯定和否定两种：
e.g.
Look?out!? 小心！
Wait??for?me!? 等我！
Come in, please! 请进！
　Sit down, please. 请坐。
　Let's go home. 我们回家吧。
二. 祈使句的肯定式

祈使句的肯定句式一般分为以下三种类型：

1. 行为动词原形＋其他成分。例如：
Make sentences after the model.
根据例句造句。

2. Be动词＋其他成分（形容词、名词或介词短语等）。例如：
Be careful when crossing the street.
过马路时要小心。

3. Let＋宾语＋动词原形＋其他成分。例如：
Let him go back now.让他现在回去吧。

(1) 肯定句：__________+ 其他
在餐厅里吃东西。
________________________________
在音乐教室里听音乐。
________________________________
骑自行车去上学。
_________________________________
Ride the bike to school.
Eat in the dining hall.
动词原形
Listen to music in the music room.

否定句: _____ + _________+ 其他
不要和同学们打架。
_______________________________
不要在教室里打篮球。
________________________________
Don’t fight with your classmates.
Don’t play basketball in the classroom.
Don’t 动词原形

三. 在公共场合的提示语中，否定祈使句常用“No＋名词/V-ing形式”结构，表示“禁止做某事”。例如：
NO PHOTOS! 禁止拍照！
NO SMOKING! 禁止抽烟！

情态动词 can?的用法
本单元can意为“可以”，表示请求、允许。如:
I?can?dance?and?sing.
2) can还可表示能力, “能，会”。如:
-- Can?the?students?run?in?the?hallways??
-- Yes, they can./No, they can’t.
We can’t eat in the classroom.?


情态动词must表说话人的主观看法，表示必须、必要。
句型结构：主语+must+动词原形+其他.
如: You must come in time.
你必须按时来。
The children must be back before 6
o’clock. 孩子们必须6点前回来。
情态动词 must?的用法


情态动词have?to?的用法
have to是“必须、不得不”, 它侧重于客观上的必要和外界的权威。
1) 结构: 主语＋have?to＋动词原形＋其他
(一般现在时, 主语是第三人称单数时, 用has?to;
句子是过去时, 用had?to.) 如：
We?have?to?wear?sneakers?for?gym?class.?
在体育课上, 我们必须穿运动鞋。
Tom?has?to?practice?the?guitar?every?day.?
汤姆每天必须练习弹吉它。
I?had?to?get?up?at?5:00?am?last?Monday.?
上周一, 我不得不早上5点起床。



2) 否定形式: 主语＋don’t?have?to＋动词原形＋其他
(一般现在时, 主语是第三人称单数时, 用doesn’t?have?to;
句子是过去时, 用didn't?have?to)
e.g. Nick?doesn't?have?to?wear?a?uniform.
? 尼克不必穿制服。
We?didn't?have?to?do?our?homework?at?once.?
我们不必马上完成作业。


3) 疑问句: Do (Does 或 Did)＋主语＋
have?to?＋动词原形＋其他
如: --Do?you?have?to?stay?at?home?on?weekends??
--Yes,?I?do.?/?No,?I?don't.?
周末你必须呆在家里吗？
是的, 我必须。/ 不, 我不必。
Did?he?have?to?go?to?bed?by?11:00?last?night??
昨晚, 他不得不11点前上床睡觉吗？?

Don’t run in the hallways. Don’t fight.
What are the rules? We must be on time for class.
Can we eat in the classroom? No, we can’t, but we can eat in the dining hall.
Can we wear a hat in class? Yes,we can. / No,we can’t.
Does he have to wear a uniform at school? Yes, he does. / No, he doesn’t.
What do you have to do? We have to be quiet in the library.
Grammar Focus

Library Rules
Don’t talk.
__________________
__________________
__________________
3a Write the rules for the
school library.
Don’t listen to music.
Don’t eat or drink.
Don’t take photos.
技巧：
1. 由图示可知都是一些禁止类的祈使句。
2. 可知应用“Don’t + 动词原形”句子。

Be quiet? (she/have to /in the library)
Q: Does she have to be quiet in the library?
A: Yes, she does.
3b Use the words to make questions
about the rules. Then write
answers according to your school.

2. Eat? (he/have to/in the dinning hall)
Q: __________________________
A: __________________________
Listen to music? (we/can/in the hallways)
Q: __________________________
A: __________________________
4. Wear a hat? (we/can/in the classroom)
Q: ________________________
A: ________________________

1. 根据例句，可知要求我们造一般疑问句并根据实际情况进行回答。
2. 先确定句子的主语。
3. 再确定用情态动词还是用助动词来构成疑问语序。
4. 根据实际情况做出肯定或否定回答，答语的主语要与问句保持一致。
方法指导


Eat?

Q:______________________________________________________
(he/have to/in the dining hall)?
A:__________________
Does he have to eat in the dining hall?
Yes, he does.
Listen to music?

Q:______________________________________________________
(we/can/in the hallways)?
A:__________________
Wear a hat?

Q:______________________________________________________
(we/can/in the classroom)?
A:__________________
Can we listen to music in the hallways?
No, we can’t.
Can we wear a hat in the classroom?
No, we can’t.
We can eat in class.
We don’t have to come to school every day.
…
3c. Make up five cool rules for your dream school. Share your rules with the class. Your classmates vote for the Coolest School!
At my dream school, we don’t have to come to school every day. We …

Report
Classroom Rules
___________________________________
___________________________________
___________________________________
___________________________________
___________________________________
We must be quiet in the classroom.
Don’t eat or drink in the classroom.
Don’t run in the classroom.
Wear slippers in the classroom.
Clean the classroom every day.
Hi. I’m…from Class….
This is a great class, but there are a lot of rules.

We can’t ...
And we must …
This is good and important.

But we can’t …
And we have to…
That’s too bad.

So, dear teacher, can we…?
Make a report
School rules
wear the school uniform
wear our own clothes
be on time
read books before breakfast
clean our classroom before class
eat in the dining room
arrive late for class
run in the hallways
eat in the classroom
listen to music in class
fight with classmates
write or draw on the desks
play with mobile phones

Thank you