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英语七年级下册Unit 4 Don’t eat in class.Section A优秀ppt课件
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这是一份英语七年级下册Unit 4 Don’t eat in class.Section A优秀ppt课件，共35页。PPT课件主要包含了Revision，be on time，walk，listen to，fight，eat，wear，祈使句 ，Do 型祈使句的构成，Be 型祈使句的构成等内容，欢迎下载使用。
Key wrds & phrases: in the hallways; be n time fr; library rules; dream schl; dn't have t. Key sentences: 1. We must be n time fr class. 2. Can we wear a hat in class? 3. Des he have t wear a unifrm at schl?T learn the imperatives and sme mdal verbs.
Can we __________________?
Dn’t _________________.
N, we can’t. We must _________.
arrive late fr class
Can we ____________________?
Dn’t ___________________.
run in the hallways
Can we _____________________?
Dn’t ______________________.
N, we can’t. We must ________ ____________.
listen t music in class
Can we _________?
Dn’t _______________.
N, we can’t. We must __________________________.
friendly t each ther
Can we___________?
eat in class
in the dining hall
Can we ______________?
N, we can’t. We must ___________________________.
sleep in class
the teacher carefully
Dn’t ____________________.
N, we can’t. We must ____________________________.
wear a hat at schl
the schl unifrm
We can’t _____________.We must _____________.We have t ___________.
Can yu list ther rules in daily life?
Grammar Fcus
祈使句一般用来表示请求、命令、劝说、号召、警告等。在祈使句中，通常省略主语yu，其肯定形式以动词原形开头，否定形式是在动词原形前加dn’t。祈使句句尾用句号或感叹号，读时用降调。为表示礼貌，可以在句首或句尾加上please。句末用please时，前面通常加逗号。
肯定句：动词原形 (+宾语)+其他. 否定句：Dn’t+动词原形 (+宾语) +其他.Wear the schl unifrm n weekdays, please. 上学日请穿校服。Dn’t watch TV befre dinner. 晚饭前不要看电视。
肯定句：Be+表语+其他. 否定句：Dn’t+be+表语 +其他.Be careful next time.下次要细心。Dn’t be late fr schl! 上学不要迟到!
肯定句：Let+宾语+动词原形+其他. 否定句：Dn’t+let+宾语+动词原形+其他. 或Let+宾语+nt+动词原形+其他.Let’s have a rest. 咱们休息一下吧。Dn’t let him g swimming. = Let him nt g swimming. 不要让他去游泳。
Let 型祈使句的构成
(1) N+v-ing! / N+名词!N fishing! 禁止钓鱼!N parking! 禁止停车!N phts! 禁止拍照!(2) never 代替dn’t 来加强语气。Never give up! 决不放弃!
情态动词have t与must
We must be n time. 我们必须准时。Des he have t wear a unifrm at schl? 他在学校必须穿校服吗？He has t live at schl because his hme is far away frm schl. 他不得不住校，因为他家离学校很远。
二者均可表示“必须”，其后均接动词原形。It’s t late. I have t take a taxi. 太晚了，我必须乘出租车。I must g nw. 我必须现在就走。
have t与must的共同点
have t与must的不同点
He has t leave schl because his family is pr. 因为家里穷，他不得不退学。(受客观因素影响)We must d smething abut it. 关于这件事我们必须做点什么。(责任感的驱使)
【拓展延伸】以must开头的一般疑问句的肯定回答用must，否定回答用needn’t或dn’t have t。—Must I leave nw? 我现在必须离开吗？ —Yes, yu must./N, yu needn’t (dn’t have t). 是的，你必须。/不，你不必。
Presentatin
Lk at the pictures in 3a and answer the questins.
1. What d the pictures tell us?
2. Can we talk ludly/eat/listen t music/take phts in the library?
3. Where can yu see these signs?
Let's predict
Write the rules fr the schl library.
Dn’t eat in the library.Dn’t listen t music in the library.Dn’t take phts in the library.
Use the wrds t make questins abut the rules. Then write answers accrding t yur schl.
Q: Des she have t be quiet in the library? (she/have t/in the library)?A: Yes, she des.
Q:__________________________________ (he/have t/in the dining hall)?A:__________________________________
Des he have t eat in the dinning hall?
Yes, he des.
Q:_________________________________(we/can/in the hallways)?A:_________________________________
Listen t music?
Can we listen t music in the hallways?
N, we can’t.
Wear a hat?
Q:_________________________________(we/can/in the classrm)?A:_________________________________
Can we wear a hat in the classrm?
Make up five cl rules fr yur dream schl. Share yur rules with the class. Yur classmates vte fr the Clest Schl!
1.We can eat in dn’t have t cme t schl every day.3. ...
At my dream schl, we dn’t have t cme t schl every day. We can eat in the classrm.We can listen t music in class.We dn’t have t d hmewrk.We dn’t have t wear schl unifrms at schl.
1.David, _______ make truble at ’t B. dn’t C. desn’t D.didn't
2.—Mm, can I play cmputer games this evening?—_______ yur hmewrk first, and then we’ll talk abut it.A. Finishing B. Finish C. T finish D. Finished
3.Buses _______ stp when the traffic lights turn red.A. can B. may C. must D.might
4.We shuld keep quiet in the library. We _____ speak ludly （大声地）.A. must B. mustn’t C. can D. needn’t
5.I _____ g nw, r I’ll miss my train.A. can B. might C. must D. culd
6.He _____ stay at hme, because it’s raining utside.A. have t B. has t C. must D. can’t
二、句型转换（每空一词）
1.Talk in class. (改为否定句)______ ______ in class.
2.I have t d my hmewrk after schl. (对画线部分提问)______ ______ yu ______ ______ ______ after schl?
3.We have t listen t the teacher. (改为一般疑问句并作肯定回答)______ we ______ ______ listen t the teacher?______, we ______.
have t
have t d
4.She has t wear the unifrm at schl. (改为一般疑问句，并作否定回答)_____ she _____ t wear the unifrm at schl?_____, she ________.
5.We can run in the hallways. (改为否定句)We _____ run in the hallways.
N desn't
Des have
祈使句(重点为否定结构)
情态动词can表“许可”的用法(肯定及否定陈述，一般疑问句结构及肯定和否定回答)
情态动词must的句型结构(仅限肯定陈述)
情态动词have t的句型结构(肯定及否定陈述，一般疑问结构及肯定和否定回答)
Key wrds & phrases: in the hallways; be n time fr; library rules; dream schl; dn't have t. Key sentences: 1. We must be n time fr class. 2. Can we wear a hat in class? 3. Des he have t wear a unifrm at schl?T learn the imperatives and sme mdal verbs.
Can we __________________?
Dn’t _________________.
N, we can’t. We must _________.
arrive late fr class
Can we ____________________?
Dn’t ___________________.
run in the hallways
Can we _____________________?
Dn’t ______________________.
N, we can’t. We must ________ ____________.
listen t music in class
Can we _________?
Dn’t _______________.
N, we can’t. We must __________________________.
friendly t each ther
Can we___________?
eat in class
in the dining hall
Can we ______________?
N, we can’t. We must ___________________________.
sleep in class
the teacher carefully
Dn’t ____________________.
N, we can’t. We must ____________________________.
wear a hat at schl
the schl unifrm
We can’t _____________.We must _____________.We have t ___________.
Can yu list ther rules in daily life?
Grammar Fcus
祈使句一般用来表示请求、命令、劝说、号召、警告等。在祈使句中，通常省略主语yu，其肯定形式以动词原形开头，否定形式是在动词原形前加dn’t。祈使句句尾用句号或感叹号，读时用降调。为表示礼貌，可以在句首或句尾加上please。句末用please时，前面通常加逗号。
肯定句：动词原形 (+宾语)+其他. 否定句：Dn’t+动词原形 (+宾语) +其他.Wear the schl unifrm n weekdays, please. 上学日请穿校服。Dn’t watch TV befre dinner. 晚饭前不要看电视。
肯定句：Be+表语+其他. 否定句：Dn’t+be+表语 +其他.Be careful next time.下次要细心。Dn’t be late fr schl! 上学不要迟到!
肯定句：Let+宾语+动词原形+其他. 否定句：Dn’t+let+宾语+动词原形+其他. 或Let+宾语+nt+动词原形+其他.Let’s have a rest. 咱们休息一下吧。Dn’t let him g swimming. = Let him nt g swimming. 不要让他去游泳。
Let 型祈使句的构成
(1) N+v-ing! / N+名词!N fishing! 禁止钓鱼!N parking! 禁止停车!N phts! 禁止拍照!(2) never 代替dn’t 来加强语气。Never give up! 决不放弃!
情态动词have t与must
We must be n time. 我们必须准时。Des he have t wear a unifrm at schl? 他在学校必须穿校服吗？He has t live at schl because his hme is far away frm schl. 他不得不住校，因为他家离学校很远。
二者均可表示“必须”，其后均接动词原形。It’s t late. I have t take a taxi. 太晚了，我必须乘出租车。I must g nw. 我必须现在就走。
have t与must的共同点
have t与must的不同点
He has t leave schl because his family is pr. 因为家里穷，他不得不退学。(受客观因素影响)We must d smething abut it. 关于这件事我们必须做点什么。(责任感的驱使)
【拓展延伸】以must开头的一般疑问句的肯定回答用must，否定回答用needn’t或dn’t have t。—Must I leave nw? 我现在必须离开吗？ —Yes, yu must./N, yu needn’t (dn’t have t). 是的，你必须。/不，你不必。
Presentatin
Lk at the pictures in 3a and answer the questins.
1. What d the pictures tell us?
2. Can we talk ludly/eat/listen t music/take phts in the library?
3. Where can yu see these signs?
Let's predict
Write the rules fr the schl library.
Dn’t eat in the library.Dn’t listen t music in the library.Dn’t take phts in the library.
Use the wrds t make questins abut the rules. Then write answers accrding t yur schl.
Q: Des she have t be quiet in the library? (she/have t/in the library)?A: Yes, she des.
Q:__________________________________ (he/have t/in the dining hall)?A:__________________________________
Des he have t eat in the dinning hall?
Yes, he des.
Q:_________________________________(we/can/in the hallways)?A:_________________________________
Listen t music?
Can we listen t music in the hallways?
N, we can’t.
Wear a hat?
Q:_________________________________(we/can/in the classrm)?A:_________________________________
Can we wear a hat in the classrm?
Make up five cl rules fr yur dream schl. Share yur rules with the class. Yur classmates vte fr the Clest Schl!
1.We can eat in dn’t have t cme t schl every day.3. ...
At my dream schl, we dn’t have t cme t schl every day. We can eat in the classrm.We can listen t music in class.We dn’t have t d hmewrk.We dn’t have t wear schl unifrms at schl.
1.David, _______ make truble at ’t B. dn’t C. desn’t D.didn't
2.—Mm, can I play cmputer games this evening?—_______ yur hmewrk first, and then we’ll talk abut it.A. Finishing B. Finish C. T finish D. Finished
3.Buses _______ stp when the traffic lights turn red.A. can B. may C. must D.might
4.We shuld keep quiet in the library. We _____ speak ludly （大声地）.A. must B. mustn’t C. can D. needn’t
5.I _____ g nw, r I’ll miss my train.A. can B. might C. must D. culd
6.He _____ stay at hme, because it’s raining utside.A. have t B. has t C. must D. can’t
二、句型转换（每空一词）
1.Talk in class. (改为否定句)______ ______ in class.
2.I have t d my hmewrk after schl. (对画线部分提问)______ ______ yu ______ ______ ______ after schl?
3.We have t listen t the teacher. (改为一般疑问句并作肯定回答)______ we ______ ______ listen t the teacher?______, we ______.
have t
have t d
4.She has t wear the unifrm at schl. (改为一般疑问句，并作否定回答)_____ she _____ t wear the unifrm at schl?_____, she ________.
5.We can run in the hallways. (改为否定句)We _____ run in the hallways.
N desn't
Des have
祈使句(重点为否定结构)
情态动词can表“许可”的用法(肯定及否定陈述，一般疑问句结构及肯定和否定回答)
情态动词must的句型结构(仅限肯定陈述)
情态动词have t的句型结构(肯定及否定陈述，一般疑问结构及肯定和否定回答)
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