Unit4SectionAGrammarFocus-3c课件--人教版七年级英语下册.pptx

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1、Unit4 1.不要在走廊里跑。不要在走廊里跑。_2.不要打架。不要打架。_ 3.我们必须准时上课我们必须准时上课._ 4.上课禁止吃或喝东西上课禁止吃或喝东西.5.上课禁止听音乐。上课禁止听音乐。_ Dont fight.Dont run in the hallways.We must be on time for class.Revision完成下列句子。Donteatordrinkinclass.Dontlistentomusicinclass.School rulesDont arrive late for school.Dont eat or drink in class.Dont

2、fight.Dont bring mobile phones to school.Dont litter.(乱扔)Be quiet in class.Listen to teachers carefully.Clean the classroom every day.Be polite(礼貌的)to teachers.Wear school uniforms You cant arrive late for school.Can you arrive late for school?No,we cant.We must be on time.Must you be on time?Yes,we

3、 must.Must you arrive at school before seven oclock?No,we neednt./dont have to.We have to wear school uniforms.Do you have to wear school uniforms?Yes,we do.No,we dont.We dont have to wear school uniforms.She has to eat lunch at school.Does she have to eat lunch at school?Yes,she does.No,she doesnt.

4、She doesnt have to eat lunch at school.must 表示主观上必须have to 表示客观需要不得不.Do you have to look after your mother?Does she have to look after her mother?walk home Does he have to walk home?Does she have to eat lunch at school?Do you have to help your mother make dinner every day?Does she have to help her m

5、other make dinner every day?Must you clean the classroon now?Must she water the flowers every day?Must you do your homework every day?1.不要在楼道里跑。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._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？_阅

6、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.Can we eat in the classroom?No,we cant,but we can eat in the dining hall.Can we wear a hat in class?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

7、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 in the library.肯定的肯定的祈使句：直接以祈使句：直接以动词原形动词原形开头的句子。开头的句子。Come in,please!请进！请进！Sit down,please.请坐。请坐。Be quiet！保持安静！保持安静！Lets go home.我们回家吧。我们回家吧。否定否定的祈使句：的祈使句：1.在动词前在动

8、词前(即句首即句首)加加Dont.Dont talk in class!不要在课堂上讲话！不要在课堂上讲话！Dont open the window!别开窗！别开窗！Dont be late for school!上学别迟到上学别迟到 祈使句祈使句常常是常常是表达说话人对对方的表达说话人对对方的劝告、叮嘱、请求劝告、叮嘱、请求或或命令命令等。等。句中一般没有主语，但根据其句意，实际上是省略了主语句中一般没有主语，但根据其句意，实际上是省略了主语you。祈使句祈使句2.在在公公共共场场合合的的提提示示语语中中，常常用用“No名名词词/V-ing形形式式”结构，表示禁止做某事。例如：结构，表示禁止

9、做某事。例如：No photos!禁止拍照！禁止拍照！一、祈使句一、祈使句1.用法：用法：一般以动词原形开头，表示请一般以动词原形开头，表示请 求、命令、求、命令、劝说、警告等。在祈使句中，通常省略句子主语第劝说、警告等。在祈使句中，通常省略句子主语第二人称二人称you。2.句子结构句子结构1.(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。_动词原形动词原形Eat in the dining hall.Listen to music in the music room.Ride the bik

10、e to school.(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 fight with your classmates.Dont play basketball in the classroom.Don t 动词原形动词原形 让我们步行去上学吧。让我们步行去上学吧。_(4)No+动词动词-ing形式形式。表示。表示“禁止、规劝禁止、规劝”禁止停车！禁止停车！_！禁止吸烟！禁止吸烟！_！禁止游泳！禁止游泳！_！Lets walk to school.No ParkingNo smokingNo swimmi

11、ngLibrary rules1.Dont talk.2._3._ _4._ _Dont eat.Write the rules for the school library.3aDont listen to music.Dont take photos.Use the words to make questions about the rules.Then write answers according to your school.3b1.Be quite?Q:Does she have to be quite in the library?(she/have to/in the libr

12、ary)A:Yes,she does.2.Eat?Q:_ (he/have to/in the dining hall)?A:_Does he have to eat in the dining hall?No,he doesnt.He can also eat outside.3.Listentomusic?Q:_(we/can/inthehallways)?A:_4.Wearahat?Q:_(we/can/intheclassroom)?A:_Can we listen to music in the hallways?Can we wear a hat in the classroom?

13、No,we cant.No,we cant.Makeupfivecoolrulesforyourdreamschool.Shareyourruleswiththeclass.YourclassmatesvotefortheCoolestSchool!3c1.We can eat in class.2.We dont have to come to school every day.3.情态动词情态动词can的用法的用法1)表示能力表示能力“会会,能能”Canyouplaytheguitar?你会弹吉它吗？你会弹吉它吗？JudycanspeakalittleChinese.朱蒂会说一点中文。朱蒂

14、会说一点中文。Icandanceandsing.我能唱歌又能跳舞。我能唱歌又能跳舞。词语链接2)表示允许、许可等。表示允许、许可等。Canthestudentsruninthehallways?学生们可以在走廊上跑吗？学生们可以在走廊上跑吗？Wecaneatoutside.我们可以在外面吃东西。我们可以在外面吃东西。3）表示请求）表示请求CanIhelpyou?注意注意:和大部分情态动词一样和大部分情态动词一样,can在否定句中在否定句中,直接在直接在can后加上后加上not,在疑问句中在疑问句中,把把can放到放到主语前面主语前面,并且没有人称和数的变化。并且没有人称和数的变化。祈使句祈使句

15、是用来表示请求、命令、叮嘱、号召或者是用来表示请求、命令、叮嘱、号召或者劝告等的句子劝告等的句子,这类句子的主语常是第二人称这类句子的主语常是第二人称you,也就是听话者也就是听话者,因而因而you常省去了。祈使句的开头常省去了。祈使句的开头是是动词原形动词原形。可在句首或句末加上可在句首或句末加上please，若在，若在句末加句末加please，之前要用逗号隔开。祈使句有肯，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。定祈使句与否定祈使句两种。如如:Lookout!小心！小心！Waithereforme!在这等我！在这等我！Besuretocomehereontime!务必务必准时

16、来到这里！准时来到这里！Listentomusicoutside.Dontlistentomusicoutside.Doyourhomeworkatschool.Dontdoyourhomeworkatschool.祈使句的否定形式多以祈使句的否定形式多以donot(常缩写成常缩写成dont)开头开头,再加上动词原形。再加上动词原形。1.肯定祈使句的常见句型结构：肯定祈使句的常见句型结构：Do型：动词原形型：动词原形+宾语宾语+其他其他.如：如：Openthedoor,please.Be型：型：Be+表语表语.如：如：Beagoodboy!Let型：型：Let+宾语宾语+动词原形动词原形+其他

17、其他.(或：或：Lets+动词原形动词原形+其他其他.)如：如：Letmehelpyou.又如：又如：Letsplaytennis.2.否定祈使句的常见句型结构：否定祈使句的常见句型结构：Do型和型和Be型的否定式：型的否定式：Dont+动词动词原形原形/be+其他其他.如：如：Dontforgetme.又如：又如：Dontbelate.Let型的否定式：型的否定式：Dont+let+宾语宾语+动词原形动词原形+其他其他.(或：或：Lets+not+动词原形动词原形+其他其他.)如：如：Dontlethimgoback.又如：又如：Letsnotgoswimming.警示语：警示语：No+名词

18、名词/动词动词-ing形式形式.如：如：Notalking.1.Mr Green smoke here,because theres a sign on the wall.It says“No smoking.”2.Its very hot outside.You wear a hat.3.We eat in the classroom,because its impolite to teachers.4.I go to bed after 11:00 on school night.5.The students read books and magazines in the library.

19、cantcancancancantPractice根据句意，用根据句意，用can和和cant填空。填空。1.We_ clean our classroom after school.2.She_ make her bed after getting up.3.Its late.Mr Beckman_ go to work by car.4.Emily and Peter join a music club.They _ practice guitar every day.have tohave tohas tohas to用用haveto或或hasto填空。填空。Practice1.抄写抄写Grammar Focus 两英一中两英一中;2.抄写抄写P123 Unit 4 单词五英一中单词五英一中;