1、Unit 4Dont eat in class.Unit 4Dont eat in class.Section AGrammar Focus3cTo learn to talk about library rulesTo learn to ask and answer questions about the rulesDont listen to music in the library!in the libraryDont eat in the library.in the libraryDont take photos in the library.No photos!Dont talk
2、in the library!No talking!in the libraryPractice Can we?Yes,we can.No,we cant.talk in the library listen to music eat in the library take photos in the libraryLibrary rules1.Dont talk.2._3._ _4._ _Dont eat.Write the rules for the school library.3aDont listen to music.Dont take photos.肯定祈使句肯定祈使句Sit d
3、own.Come in.Eat at home.否定祈使句否定祈使句Dont sit down.Dont come in.Dont eat at home.祈使句祈使句是用来表示请求、命令、叮嘱、号是用来表示请求、命令、叮嘱、号召或者劝告等的句子召或者劝告等的句子,这类句子的主语常这类句子的主语常是第二人称是第二人称you,也就是听话者也就是听话者,因而因而you常常省去了。祈使句的开头是省去了。祈使句的开头是动词原形动词原形。如如:Arrive late for class!上课迟到！上课迟到！Listen to music!听音乐！听音乐！Go home on time after sch
4、ool!放学后按放学后按时回家时回家1.Listen to music outside.Dont listen to music outside.2.Do your homework at school.Dont do your homework at school.3.Dont look out of the window.不要向窗外看。不要向窗外看。祈使句的否定形式多以祈使句的否定形式多以do not(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。祈使句表示请求、命令、劝说、号召、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，可在句首警告等。表示委婉的
5、祈使语气，可在句首或句末加上或句末加上please，若在句末加，若在句末加please，之前要用逗号隔开。祈使句有肯定祈使句之前要用逗号隔开。祈使句有肯定祈使句与否定祈使句两种。与否定祈使句两种。祈使句的常见句型结构祈使句的常见句型结构Use the words to make questions about the rules.Then write answers according to your school.3b3b1.Be quite?Q:Does she have to be quite in the library?(she/have to/in the library)A:Ye
6、s,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.Listen to music?Q:_ (we/can/in the hallways)?A:_ 4.Wear a hat?Q:_ (we/can/in the classroom)?A:_Can we listen to music in the hallways?Can we wear a hat in the classro
7、om?No,we cant.No,we cant.I _a uniform every day.They _wear a uniform every day.Yes,_.Look and say.Do you have to wear a uniform every day?have toNo,_.have to wearI doI dontI _do homework every day.have toI _on weekends.have to clean my bedroom Make up five cool rules for your dream school.Share your
8、 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.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
9、to study hard at all lessons.What do you have to do at school?Group work将下面的句子改为祈使句，每空一词。将下面的句子改为祈使句，每空一词。1.You can come in._ _,please.2.I can help you._ me _ you.3.You cant eat in class._ _ in class.4.You cant be late for school._ _ late for school.5.You cant take photos here._ photos here.Come inLet helpDont eatDont beNoWrite down ten sentences about what you can or cant do in your house.We cant eat in bed.We cant fight.
