PEP七年级英语下册Unit4 Section A Period Two

祈使句的常见句型结构
祈使句表示请求、命令、劝说、号召、 警告等。表示委婉的祈使语气，可在句首或句末加上please，若在句末加please，之 前要用逗号隔开。祈使句有肯定祈使句与否定祈使句两种。
1. 肯定祈使句的常见句型结构： ① Do型：动词原形+宾语+其他. 如：
Open the door, please. ② Be型：Be+表语. 如：Be a good boy! ③ Let型：Let+宾语+动词原形+其他. (或：Let’s+动词原形+其他.) 如：
3c
Make up five cool rules for your dream school. Share your rules with the class. Your classmates vote for the Coolest School!
1. We can eat in class. 2. We don’t have to come to school every day. 3. …
No schoolbags!
Don’t arrive late for class.
in the library
Don’t talk in the library!
No talking! Be quiet !
in public (在公共场所) loudly adv. 大声地
Don’t talk loudly in public!
如: Look out! 小心！ Wait here for me! 在这等我！ Be sure to come here on time! 时来到这里！
务必准
祈使句的否定形式多以do not (常缩写成don’t) 开头, 再加上动词原形。
Listen to music outside. Don’t listen to music outside. Do your homework at school. Don’t do your homework at school. Don’t look out of the window. 不要向窗外看。
No, he doesn’t. He can also eat outside.
3. Listen to music? Q: ________________________________ (we/Ccan/winetlhisetehnaltlowmayuss)i?c in the hallways? A: ________________
我们必须努力学习。
努力学习：study hard
Pair work
Ask and answer questions about the rules at your school.
Do we have to wear a uniform?
Yes, we do.
-- Do you have to…in the school? -- Yes, we do. / No, we dfor the school library. 3a
Library rules 1. Don’t talk. 2. __________ 3. __________
__D__o_n_’t_e_at. 4. __________
__D__o_n_’t_listen to music.
• What time does the school begin in the morning?
• When do you have to arrive at school in the morning?
• As students, what do you have to do in the school?
Practice
Can we …? Yes, we can. No, we can’t.
• eat in class • listen to music
outside • wear hats in school • fight in class • speak loudly in the
library
4. Wear a hat? Q: _______________________________ (we/ cNaon,/ winethcaenc’lta. ssroom)? A: _______________
Can we wear a hat in the classroom?
No, we can’t.
wear school uniforms every day clean the classrooms every day do morning exercises every day do homework every day have classes from Monday to Saturday do eye exercises every day arrive at school before 7:50 am listen to teachers every day
Unit 4
Don’t eat in class.
Section A Period Two
What are the rules at our school?
Boys can’t keep their hair long. Don’t ride bikes at school. Don’t bring music players to school. Don’t read comic books in class. Don’t watch TV on school nights. DDDoDonoon’ntn’t’e’ttwatfpraiusrlptgeliarnlkesihayanvteirtyeine.psntnahpclticaeohtnoltreamacecttmslhlpfasiaaoinus.snlsrtslcerwi.tcolcrhalaoaegsiymnsacs.mlc.alesass.rso. om.
library.
安静
标志
Don’t smoke! No smoking!
Don’t fight.
in the classroom
Don’t listen to music in the classroom!
Don’t run in the hallways.
in the classroom
Let me help you. 又如：Let’s play tennis.
Can the students run in the hallways? 学生们可以在走廊上跑吗？ We can eat outside. 我们可以在外面吃东西。
注意: 和大部分情态动词一样, can在否定句中, 直接在can后加上not, 在疑问句中, 把 can放到主语前面, 并且没有人称和数的变化。
我们必须准时到达学校。 We have to arrive at school on time. We have to do homework every day.
我们必须每天做作业。 We have to clean the classroom every day. W我e们h必ave须to每k天ee打p t扫he教cl室ass。room clean. We have to study hard. 我们必须保持教室的干净。
John: Really? What are somloetsooffthe rules?
Alice: Well, don’t be late for class. This is very
important. John: Ok, so weamrruivsetlbatee foonr time. Can we
作为
Look and say. 用have to
We _____h_a_vwe etoar a uniform every day.
Do you have to wear a uniform every day? Yes,____.I do
No,____I _d_o.n’t
What do you have to do ?
2. Eat? Q: ________________________________ (he/ have to/ in the dining hall)? A: _________________________________
Does he have to eat in the dining hall?
肯定祈使句 Sit down. Come in. Eat at home.
否定祈使句 Don’t sit down. Don’t come in. Don’t eat at home.
祈使句是用来表示请求、命令、叮嘱、号召或 者劝告等的句子, 这类句子的主语常是第二人 称you,也就是听话者,因而you常省去了。祈使 句的开头是动词原形。
词语链接
情态动词can的用法 1) 表示能力 “会, 能” Can you play the guitar? 你会弹吉它吗？ Judy can speak a little Chinese. 朱蒂会说一点中文。 I can dance and sing. 我能唱歌又能跳舞。
2) 表示允许、许可, “可以”、“能” (在这一课中新学的词义)
What else do you have to do at school? We have to…
We have to… We have to arrive at school on time. We have to do homework every day. We have to clean the classroom every day. We have to keep the classroom clean. We have to study hard at all lessons.
bring music players to school?
Alice: No, we can’t. And we always have to
wear the school uniform.
John: I see.
Alice: Oh, and we校a服lso have to be quiet in the
What do you have to do ? I __h_a_v_e__todo homework every day.
I __h_a_v_e_t_o_c_l_ea_n__m_y__b_e_d_ro_o_m_ on weekends.
Group work
What do you have to do at school?
2d Role-play the conversation.
John: Hi, my name’s John. It’s my first day at
school.
我在学校的第一天
Alice: Hi, John. I’m Alice. This is a great
school, but there are a lot of rules.
Don’t eat in the classroom.
Don’t take photos here. No photos!
Please turn right!
You can turn right!
in the library
take… to… 随身带
Don’t take your schoolbags to the library!
Don’t take photos.
3b Use the words to make questions about the rules. Then write answers according to your school.
1. Be quiet? Q: Does she have to be quiet in the library? (she/have to/in the library) A: Yes, she does.