1、Unit 4 Dont eat in class.Section A Grammar Focus-3cWarming upGrammar FocusPresentationExercises SummaryHomework人教版 英语 七年级下册Learning goals1.Functions:能简单谈论规章制度2.Grammar: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 to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)Mine sweeping扫雷游戏单
2、词下埋着6颗雷，学生选择单词并读出，如果单词下没有雷则可得分，如果有，则不得分。Warming upGame time131133111422222Warming upwearfightrun in the hallwaysarrive late for classbe quietschool uniformsorrydining hallbringmustlisten toon timehave tooutsideimportantdonthallcanschool ruleseat in classWarming upCan we _?Dont _.No,we cant.We must _
3、.arrive late for classbe on timearrive late for class对不起！老师，我迟到了。以后要注意啊。回到座位上吧。Warming upCan we _?Dont _.No,we cant.We must _.run in the hallwayswalkrun in the hallwaysWarming upCan we _?Dont _.No,we cant.We must _ _.listen to music in classlisten toour teacherlisten to music in classWarming upCan w
4、e _?Dont _.No,we cant.We must _.fightfriendly to each otherbefightWarming upCan we_?Dont _.No,we cant.We must _.eat in classin the dining halleateat in classWarming upCan we _?Dont _.No,we cant.We must _.sleep in classlisten tothe teacher carefullysleep in classWarming upCan we _?Dont _.No,we cant.W
5、e must _.wear a hat at schoolwearthe school uniformwear a hat at schoolIn classWe cant _.We must _.We have to _.BrainstormPresentationAt schoolWe cant _.We must _.We have to _.BrainstormPresentationAt homeI cant _.I must _.I have to _.BrainstormPresentationPresentationHow to talk about rules?Grammar
6、 FocusDont run in the hallways.Dont fight.What are the rules?We must be on time for class.Can we eat in the classroom?No,we cant,but we can eat in the dining hall.Can we wear a hat in class?Yes,we can./No,we cant.Does he have to wear a uniform at school?Yes,he does./No,he doesnt.What do you have to
7、do?We have to be quiet in the library.Observe this chart.Grammar Focus1.祈使句的否定句怎样构成？肯定句呢？一般在什么情况下会用祈使句？2.情态动词在用法上有什么共同点？3.can在本单元主要表示什么含义？它还可表达什么意思？4.have to在句法上与其他情态动词有何区别？Work in pairs and answer the questions.Dont run in the hallways.Dont fight.What are the rules?We must be on time for class.Can
8、we eat in the classroom?No,we cant,but we can eat in the dining hall.Can we wear a hat in class?Yes,we can./No,we cant.Does he have to wear a uniform at school?Yes,he does./No,he doesnt.What do you have to do?We have to be quiet in the library.Grammar Focus祈使句的否定句怎样构成？肯定句呢？祈使句的否定句在动词原形前加dont，表示“不要做什
9、么事”。祈使句的肯定句通常是以动词原形开头的。Dont run in the hallways.Dont fight.What are the rules?We must be on time for class.Can we eat in the classroom?No,we cant,but we can eat in the dining hall.Can we wear a hat in class?Yes,we can./No,we cant.Does he have to wear a uniform at school?Yes,he does./No,he doesnt.Wha
10、t do you have to do?We have to be quiet in the library.Grammar Focus一般在什么情况下会用祈使句？祈使句一般用于上级对下级，长辈对晚辈之间，表示命令、劝说或警告，也可表示请求。Dont run in the hallways.Dont fight.What are the rules?We must be on time for class.Can we eat in the classroom?No,we cant,but we can eat in the dining hall.Can we wear a hat in c
11、lass?Yes,we can./No,we cant.Does he have to wear a uniform at school?Yes,he does./No,he doesnt.What do you have to do?We have to be quiet in the library.Grammar Focus情态动词在用法上有什么共同点？can,must,have to后接动词原形。Dont run in the hallways.Dont fight.What are the rules?We must be on time for class.Can we eat i
12、n the classroom?No,we cant,but we can eat in the dining hall.Can we wear a hat in class?Yes,we can./No,we cant.Does he have to wear a uniform at school?Yes,he does./No,he doesnt.What do you have to do?We have to be quiet in the library.Grammar Focuscan在本单元主要表示什么含义？它还可表达什么意思？can的意思是“能够；允许“，还可表示“能力”。D
13、ont run in the hallways.Dont fight.What are the rules?We must be on time for class.Can we eat in the classroom?No,we cant,but we can eat in the dining hall.Can we wear a hat in class?Yes,we can./No,we cant.Does he have to wear a uniform at school?Yes,he does./No,he doesnt.What do you have to do?We h
14、ave to be quiet in the library.Grammar Focushave to在句法上与其他情态动词有何区别？have to有人称和数的变化。Grammar Focus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you，其肯定形式以动词原形开头，否定形式是在动词原形前加dont。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。语法概述Presentation 肯定句：动词原形(+宾语)+其他.否定句：Dont+动词原形(+宾语)+其他.Wear the school
15、uniform on weekdays,please.上学日请穿校服。Dont watch TV before dinner.晚饭前不要看电视。Do 型祈使句的构成Presentation 肯定句：Be+表语+其他.否定句：Dont+be+表语+其他.Be careful next time.下次要细心。Dont be late for school!上学不要迟到!Be 型祈使句的构成Presentation 肯定句：Let+宾语+动词原形+其他.否定句：Dont+let+宾语+动词原形+其他.或Let+宾语+not+动词原形+其他.Lets have a rest.咱们休息一下吧。Dont
16、let him go swimming.=Let him not go swimming.不要让他去游泳。Let 型祈使句的构成Presentation其他类型的否定祈使句(1)No+v-ing!/No+名词!No fishing!禁止钓鱼!No parking!禁止停车!No photos!禁止拍照!(2)never 代替dont 来加强语气。Never give up!决不放弃!Grammar Focus情态动词have to与mustWe must be on time.我们必须准时。Does he have to wear a uniform at school?他在学校必须穿校服吗？
17、He has to live at school because his home is far away from school.他不得不住校，因为他家离学校很远。语法示例Presentation二者均可表示“必须”，其后均接动词原形。Its too late.I have to take a taxi.太晚了，我必须乘出租车。I must go now.我必须现在就走。have to与must的共同点Presentationhave to与must的不同点 have to强调因客观因素影响而不得不做某事，跟主观意愿无关，通常上下文中会有暗示客观因素的句子，多译为“不得不”。must 表示因
18、主观需要或责任感的驱使而有必要或义务去做某事，多译为“必须”。Presentationhave to与must的不同点 have to可用于不同的时态，有人称和数的变化，其一般现在时的第三人称单数形式为has to；过去式为had to。must 一般只用来表示现在，没有人称和数的变化。Presentationhave to与must的不同点 have tohave to的否定形式为dont/doesnt/didnt have to，表示“不必”。must must的否定形式为mustnt，表示“禁止，不准“。PresentationHe has to leave school because
19、 his family is poor.因为家里穷，他不得不退学。(受客观因素影响)We must do something about 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neednt或dont have to。Must I leave now?我现在必须离开吗？Yes,you must./No,you neednt(dont have to).是的，你必须。/不，你不必。PresentationLook at the pictures in 3a and answer the questions.12341
20、.What do the pictures tell us?2.Can we talk loudly/eat/listen to music/take photos in the library?3.Where can you see these signs?PresentationWrite the rules for the school library.3a Library Rules1._2._3._4._Dont talk.1234Dont eat in the library.Dont listen to music in the library.Dont take photos
21、in the library.PresentationUse the words to make questions about the rules.Then write answers according to your school.Q:Does she have to be quiet in the library?(she/have to/in the library)?A:Yes,she does.Be quiet?3bDoes he have to eat in the dinning hall?Yes,he does.Eat?Q:_(he/have to/in the dinin
22、g hall)?A:_Q:_(we/can/in the hallways)?A:_PresentationListen to music?Can we listen to music in the hallways?No,we cant.Wear a hat?Q:_(we/can/in the classroom)?A:_Can we wear a hat in the classroom?No,we cant.wear a hat?Listen to music?Eat?PresentationDo we have any library rules in our school?Ask a
23、nd answer in pairs.Do you have to.in the library?Yes,./No,.Be quiet?Presentationthe students/have to/clean classroom/every day she/have to/be at home/at five oclockshe/have to/do morning reading/every day we/can/arrive at school/lateMake more conversations using these words.PresentationMake up five
24、cool rules for your dream school.Share your rules with the class.Your classmates vote for the Coolest School!3c1.We can eat in class.2.We dont have to come to school every day.3.At my dreamschool,we dont haveto come to schoolevery day.We.Exercises一、单项选择 123(永州中考)David,_ make trouble at school.A.cant
25、 B.dont C.doesnt(凉山州中考)Mom,can I play computer games this evening?_ your homework first,and then well talk about it.A.Finishing B.Finish C.To finish D.Finished(怀化中考)Buses _ stop when the traffic lights turn red.A.can B.may C.mustBBCExercises 456(凉山州中考)We should keep quiet in the library.We _ speak l
26、oudly(大声地).A.must B.mustnt C.can D.neednt(北京中考)I _ go now,or Ill miss my train.A.can B.might C.must D.could He _ stay at home,because its raining outside.A.have to B.has to C.must D.cantBBCExercises 二、句型转换（每空一词）Talk in class.(改为否定句)_ _ in class.I have to do my homework after school.(对画线部分提问)_ _ you
27、_ _ _ after school?We have to listen to the teacher.(改为一般疑问句并作肯定回答)_ we _ _ listen to the teacher?_,we _.DonttalkDohave toWhatdohave to doYes123doShe has to wear the uniform at school.(改为一般疑问句，并作肯定回答)_ she _ to wear the uniform at school?_,she _.We can run in the hallways.(改为否定句)We _ run in the hallways.45Yes doesDoes havecantExercisesSummary Unit 4 Dont eat in class.(Grammar Focus-3c)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)Grammar情态动词must的句型结构(仅限肯定陈述)情态动词have to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)Homework学校组建了一个音乐俱乐部，现在向全体同学征求俱乐部规则，请写出你的合理建议，至少五条。THANKS谢谢聆听！
