1、Grammar,Unit 4,Grammar A,Turn left!,Guessing Game,Turn right!,Guessing Game,Walk on the zebra crossing!,Guessing Game,Guessing Game,Dont smoke! No smoking!,Guessing Game,Dont park your car!,Guessing Game,Dont pick the flowers!,Read and observe(观察),Turn left!,Turn right!,Walk on the zebra crossing!,D
2、ont smoke!,Dont park your car!,Dont pick the flowers!,They are all imperative sentences.（祈使句）,句子,We start a sentence with the base form of a verb when we want to tell people what to do.,We add dont in front of the verb when we want to tell people not to do something.,祈使句的结构如下：do sthDont do sth.,肯定：,
3、否定：,祈使句表示请求、命令、建议等等。 谓语动词一律用原形。 句子中通常不用主语，句末用感叹号或者句号。,Draw the conclusion (得出结论),祈使句句式详解,1. 肯定的祈使句 （1）动词原形+其他Stand up, please. = Please stand up. 请起立。 （2） Be + adj. Be careful! = Look out! = Take care! 小心 / 当心！ （3） Lets + 动词原形 Lets go to school together. 咱们一起上学去吧。,祈使句句式详解,2. 否定的祈使句 （1） Dont + 动词原形 D
4、ont stand up. 别站起来。 Dont be careless. 别粗心。 Dont let them play with fire. 别让他们玩火。 （2） Lets ( let sb ) + not + 动词原形 Lets not say anything about it. 对于这件事，咱们什么也别说。 Let them not play with fire. 别让他们玩火。,祈使句句式详解,与please连用,使语气委婉为使语气委婉，通常将祈使句与please连用。Please可用于祈使句的句首，通常不用逗号如果用于句末，前面通常用逗号。如：Please dont get a
5、ngry. 请不要生气。Please drive more slowly. 请开得慢一点。Try to be quiet, please. 请设法保持安静。,Put up a picture on the wall.,Put up a shelf on the wall.,Try to give instructions,Dont swim here.,Dont park your bike here.,Park your bike here.,Please go slowly.,Dont smoke here.,Dont fish here.,Be quiet, please.,Dont m
6、ake any noise.,Millie is teaching her classmates how to make cards to help them remember things better. Look at the pictures and help Millie complete the instruction.,How to make cards,_ out pieces of card with a pair of scissors.,Cut,_ some words or a sentence on each card.,Write,_ a picture about
7、the words or sentence on the other side of the card.,Draw,_ at the picture and _ to remember what is on the other side.,Look,try,Please _ (not) up. _ trying, and you will find you can remember things better.,dont give,Keep,1 -Its her birthday next week.- Then_ her about the surprise birthday. (tell)
8、 2 How can I get to Peoples Hospital? -_ along the street and _ left at the lights.,dont tell,turn,Go,Exercises,3 -We have to finish the work in two hours.- Then lets_ any time. (waste) 4 -_so much noise, please.- Ok. (make),not waste,Dont make,1. 剪出 2. 写一些话或一个句子 3. 在每张卡上 4. 在卡的另一面 5. 尝试做某事 6. 记住某事
9、7. 放弃 8. 放弃某事/做某事 9. 坚持尝试 10. 把事情记得更好,cut outwrite some words or a sentence on each sideon the other side of the cardtry to do sth.remember sth.give upgive up sth. / doing sth.keep tryingremember things better,Useful Expressions,Grammar B,Using should and had better,We use should and had better when
10、 giving advice and telling people what is the best or right thing to do.The tone of had better is stronger than should.,had better do sth had better not do sth It is pretty cold. Youd better put on my coat. Shed better not play with the dog. should do sthshould not do sthYou should be quiet in class
11、.You should not be late for school.,1. Please know a little about DIY.,You should know a little about DIY.,We use should and had better when giving advice and telling people what is the best or right thing to do.,You had better know a little about DIY.,2. Please put in a brighter light in the room.,
12、You should put in a brighter light in the room.,We use should and had better when giving advice and telling people what is the best or right thing to do.,You had better put in a brighter light in the room.,3. Dont hit the pipe.,You should not/ shouldnt hit the pipe.,You had better not hit the pipe.,
13、We use should and had better when giving advice and telling people what is the best or right thing to do.,4. Dont paint the whole room blue.,You should not/shouldnt paint the whole room blue.,You had better not paint the whole room blue.,We use should and had better when giving advice and telling pe
14、ople what is the best or right thing to do.,DIY advice,Suzy is giving DIY advice to her classmates. Read the advice below. Help Suzy make sentences with should (not) or had better (not).,DIY advice,Read the advice and make sentences with should (not) or had better (not).,begin your work without read
15、ing them,You shouldnt begin your work without reading them.,You had better not begin your work without reading them.,DIY advice,Read the advice and make sentences with should (not) or had better (not).,join a DIY club to learn more about it,You should join a DIY club to learn more about it.,You had
16、better join a DIY club to learn more about it.,DIY advice,Read the advice and make sentences with should (not) or had better (not).,be patient,You should be patient.,You had better be patient.,DIY advice,Read the advice and make sentences with should (not) or had better (not).,buy some to learn more
17、 about it,You should buy some to learn more about it.,You had better buy some to learn more about it.,DIY advice,Read the advice and make sentences with should (not) or had better (not).,play with them when you do DIY jobs,You should not play with them when you do DIY jobs.,You had better not play w
18、ith them when you do DIY jobs.,a begin your work without reading themb join a DIY club to learn more about it c be patient d buy some to learn more about ite play with them when you do DIY jobs,1. There are many useful books about DIY.,You should / had better buy some to learn more about it.,2. DIY
19、is not easy.,You should/ had better join a DIY club to learn more about it.,You shouldnt / had better not begin your work without reading them.,3. Instructions are important.,You should / had better be careful when you use them.,4. Scissors can be dangerous.,You should/ had better be patient.,5. Som
20、etimes itll take time to do a DIY job.,1. 当我们向他人发出命令、提出要求或建议时，常使用祈使句。其主语通常不明确表示出来。其否定形式是在动词原形前加do not/dont。为了表示客气和礼貌，可以加上please。 2. 当我们给他人提建议时，可以用had better和should，表示“最好”或“应该”做某事。否定形式是had better not和should not/shouldnt。,Reflection,Lets do exercise.,1. Jim, _ me a hand. A. gives B. is giving C. will
21、give D. give 2. _ careful, Jenny! There is a tree in front of you. A. Am B. / C. Be D. Was 3. Lets _ our time. A. not waste B. no wasting C. not to waste D. no waste 4. _ higher, and you will see the house.OK.A. If you stand B. To stand C. When you stand D. Stand,Exercises:,5. Please _ do it.A. he B
22、. let him C. let he D. him 6. _ let anyone open the door. A. Dont B. Will C. Not D. No 7. Dont be late again.Sorry, _.A. I may B. I must C. I will D. I wont 8. Call me when you get home.OK, _.A. I must B. I can C. I will D. I may,Exercises:,9. _ forget to write to me when you _ get there next Tuesda
23、y. A. Dont; will B. Please; will C. Please; / D. Dont; / 10. _ let anyone open the door. A. Dont B. Will C. Not D. No 11. _ 6 and 4, and you will get ten.A. Added B. Adding C. To add D.Add 12. ._ late again, or Ill report it to your father.A. Dont be B. You arent C. Cant be D. Arent,13. - Can I leav
24、e this door open at night?-You _ better not . A. should B. would C. could D. had14.You _ smoke while you are walking around in the woods here. A. should B. shouldnt C. shouldnt to D. should to,I. 单项选择。,1. The TV is too loud. Please _. A. turn it down B. to turn it down C. turn down it D. to turn dow
25、n it 2. _ late again, Bill! A. Dont to be B. Dont be C. Not be D. Be not,3. _ cross the road until the traffic lights turn green. A. Not B. Wont C. Doesnt D. Dont 4. _ me the truth, or Ill be angry. A. Telling B. To tell C. Told D. Tell,II. 句型转换。,1. Will you please read it again more slowly? (改为祈使句)
26、 _ again more slowly, please. 2. If you dont listen to me, Ill go. (改为同义句) _ me, or Ill go. 3. The teachers often tell the students not to be careless. (改为祈使句) _ careless, please. 4. Please sit next to Nancy. (改为否定句) _ next to Nancy.,Read it,Listen to,Dont be,Dont sit,III. 完成句子。,1. 你应该在南京换火车。_ change trains at Nanjing. 2. 你最好在下雨前回家。_ before the rain starts. 3. 现在你最好别打棒球了。_ baseball now. 4. 不要把金鱼放在阳光下。_ the goldfish in the sun.,You should,Youd better go home,You had better not play,Dont put,