1、1)表示能力表示能力,“会会”,“能能”(在第一册中已经学习在第一册中已经学习这种用法这种用法)例如例如:Can you play the guitar?你会弹吉它吗？你会弹吉它吗？Judy can speak a little Chinese.朱蒂会说一点中文。朱蒂会说一点中文。I can dance and sing.我能唱歌又能跳舞。我能唱歌又能跳舞。1.情态动词情态动词can的用法的用法2)表示允许、许可表示允许、许可,“可以可以”、“能能”(在这一课在这一课中新学的词义中新学的词义)例如例如:Can the students run in the hallways?学生们可以在走廊上
2、跑吗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。我们可以在外面吃东西。Can I come in?我能进来吗我能进来吗?2.情态动词情态动词have to 的用法的用法have to意思是意思是“必须、不得不必须、不得不”,它侧重于客观它侧重于客观上的必要和外界的权威。上的必要和外界的权威。1)结构结构:主语主语have to动词原形其他动词原形其他(一般现在时一般现在时,主语是第三人称单数时主语是第三人称单数时,用用has to;)如：如：We have to wear sneakers for gym class.在体育课上在体育课上,我们必须穿运动
3、鞋。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。汤姆每天必须练习弹吉它。2)否定形式否定形式:主语主语dont have to动词原形动词原形其他其他(一般现在时一般现在时,主语是第三人称单数时主语是第三人称单数时,用用doesnt have to;)e.g.Nick doesnt have to wear a uniform.尼克不必穿制服。尼克不必穿制服。I dont have to do my homework at first.我不必马上完成作业。我不必马上完成作业。3)疑问句疑问句:Do(Does)主语主
4、语 have to 动词原形其他动词原形其他如如:-Do you have to stay at home on weekends?-Yes,I do./No,I dont.周末你必须呆在家里吗？周末你必须呆在家里吗？是的是的,我必须。我必须。/不不,我不必。我不必。We have to wear sneakers for gym class.Tom has to practice the guitar every day.must 表示人的主观看法，意味“必须，得”，没有人称和时态的变化，只用于一般现在时。其否定形式mustnt表示“禁止，不允许”。I must leave right no
5、w.We mustnt take dogs to the park.回答由must引导的疑问句，肯定回答用must，否定回答用neednt或dont/doesnt have to.Must she finish her homework before 7:00?Yes,she must.No,she neednt./No,she doesnt have to.3.情态动词情态动词must的用法的用法1.祈使句祈使句是表示请求、命令、叮嘱、号召、是表示请求、命令、叮嘱、号召、劝告等的句子劝告等的句子;通常省略主语通常省略主语you;句中谓语句中谓语动词用动词原形动词用动词原形;句尾一般用降调句尾
6、一般用降调;祈使句的祈使句的开头是动词原形开头是动词原形。祈使句有祈使句有肯定肯定和和否定否定两种：两种：e.g.Look out!小心！小心！Wait here for me!在这等我！在这等我！GrammarListen to me.Stand up.Sit down.Come in.Go away.Look at the blackboard.Be a good girl.Be late.Be careful.Be quiet.Lets play basketball.Let him have breakfast.Let her watch TV.怎么变为否定句？在句首加Dont2.句子
7、结构句子结构(1)肯定句：肯定句：_动词原形动词原形_+其他其他 Listen to me.Stand up.Sit down.Come in.Go away.Look at the blackboard.Be a good girl.Be late.Be careful.Be quiet.Lets play basketball.Let him have breakfast.Let her watch TV.2.句子结构句子结构(2)否定句否定句:Dont+动词原形动词原形+其他其他Dont listen to me.Dont be a good girl.(3)No+动词动词-ing形式。
8、表示形式。表示“禁止、禁止、规劝规劝”禁止停车！禁止停车！No Parking.禁止吸烟！禁止吸烟！No Smoking.2.句子结构句子结构(1)肯定句：肯定句：_+其他其他 在餐厅里吃东西。在餐厅里吃东西。_ 在音乐教室里听音乐。在音乐教室里听音乐。_ 骑自行车去上学。骑自行车去上学。_Ride the bike to school.Eat in the dining hall.动词原形动词原形Listen to music in the music room.(2)否定句否定句:_+_+其他其他 不要和同学们打架。不要和同学们打架。_ 不要在教室里打篮球。不要在教室里打篮球。_Dont
9、fight with your classmates.Dont play basketball in the classroom.Dont 动词原形动词原形1.Sit down.2.Come in.3.Eat at home.Dont sit down.Dont come in.Dont eat at home.把下列祈使句改成否定句把下列祈使句改成否定句4.Listen to music outside.5.Do your homework at school.Dont listen to music outside.Dont do your homework at school.1.不要在
10、楼道里跑。不要在楼道里跑。_2.不要打架。不要打架。_3.有什么规则？有什么规则？_ 4.我们必须按时上课我们必须按时上课._阅读阅读Grammar Focus部分，完成下列句子。部分，完成下列句子。Dont fight.Dont run in the hallways.What are the rules?We must be on time for class.5.我们可以在教室里吃东西吗？我们可以在教室里吃东西吗？_6.不能。但我们可以在餐厅里吃东西。不能。但我们可以在餐厅里吃东西。_ _7.我们可以在上课的时候带帽子吗？我们可以在上课的时候带帽子吗？_Can we wear a hat
11、 in class?No,we cant,but we can eat in the dining hall.Can we eat in the classroom?8.他在学校里必须穿校服吗？他在学校里必须穿校服吗？_9.是的，必须。是的，必须。/不，不必。不，不必。_10.你们必须做什么？你们必须做什么？_ 11.在图书馆里我们必须保持安静。在图书馆里我们必须保持安静。_Yes,he does./No,he doesnt.Does he have to wear a uniform at school?What do you have to do?We have to be quiet i
12、n the library.二、询问和讨论学校规则：二、询问和讨论学校规则：1.有什么规则？有什么规则？我们必须保持安静。我们必须保持安静。_ _ 2.我们可以在上课的时候戴帽子吗？我们可以在上课的时候戴帽子吗？_ 不可以。你可以在外面戴帽子。不可以。你可以在外面戴帽子。_ _What are the rules?We must be quiet.Can we wear a hat in class?No,we cant.You can wear a hat outside.3.你必须做什么事？你必须做什么事？_ 我们必须穿校服。我们必须穿校服。_4.他必须在校吃午饭吗？他必须在校吃午饭吗？_
13、We must wear the school uniforms.What do you have to do?Does he have to eat lunch at school?Library Rules1.Dont talk.2._3._4._3a Write the rules for the school library.Dont listen to music.Dont eat or drink.Dont take photos.方法指导：方法指导：1.由图示可知都是一些禁止类的祈使句。由图示可知都是一些禁止类的祈使句。2.可知应用可知应用“Dont+动词原形动词原形”句子。句子
14、。1.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:_3.Listen to music?(we/can/in the hallways)Q:_ A:_ 4.Wear a hat
15、?(we/can/in the classroom)Q:_ A:_1.根据例句，可知要求我们造一般疑问句根据例句，可知要求我们造一般疑问句并根据实际情况进行回答。并根据实际情况进行回答。2.先确定句子的主语。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再确定用情态动词还是用助动词来构成疑问语序。疑问语序。4.根据实际情况做出肯定或否定回答，答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。语的主语要与问句保持一致。2.Eat?(he/have to/in the dining hall)Q:_?A:_3.Listen to music?(we/can/in the ha
16、llways)Q:_?A:_ 4.Wear a hat?(we/can/in the classroom)Q:_?A:_Then answer the questions.Yes,he does.Does he have to eat in the dining hallCan we listen to music in the hallwaysNo,we cant.Can we wear a hat in the classroomNo,we cant.At my dream school,we dont have to come to school every day.We can eat
17、 in class.3c Make up five cool rules for your dream school.Share your rules with the class.Your classmates vote for the Coolest School!We dont have to wear school uniforms.We can listen to music in class.We can eat in the classroom.We dont have to do homework.At my dream school,we dont have to come
18、to school every day.We can eat in the classroom.We can listen to music in class.We dont have to do homework.We dont have to wear school uniforms at school.Great!Jims school is the coolest.Discuss and make rules for the computer room in your school.Computer Rules1._2._3._4._5._We must be quiet in the
19、 computer room.Dont run in the computer room.Dont eat or drink in the computer room.Wear slippers in the computer room.Computer Rules1._2._3._4._5._We must be quiet in the computer room.Dont eat or drink in the computer room.Dont run in the computer room.Wear slippers in the computer room.Clean the
20、computer room every day.1.He has to eat breakfast quickly.(改为一改为一般疑问句般疑问句)_2.Play volleyball after class.(改为否定句改为否定句)_句型转换句型转换Does he have to eat breakfast quickly?Dont play volleyball after class.3.We can wear sports shoes in class.(改为一改为一般疑问般疑问)_4.Dont arrive late for class.(改为同义句改为同义句)_5.Eric has to do his homework before six.(对划线部分提问对划线部分提问)_Can we wear sports shoes in class?We must be on time for class.What does Eric have to do before six?1.Remember the sentences in the Grammar Focus.2.Write five rules in your family.
