unit 1 Food for thought 情态动词 第4课时ppt课件--（2022）新外研版（2019版）高中英语必修二.pptx

1、情态动词一情态动词一Unit 1 using languageTeaching aims:1.To learn the grammar about Modal verbs.2.To do some exercises to practice them.情态动词表示说话人的某种语气或者情绪，如可能，意愿，猜测，义务，需要等。情态动词不能单独做谓语，后面接动词原形；情态动词没有人称和数的变化（be able to，have to除外）有些情态动词有过去式，如can-could，may-might，will-would，dare-dared，have to-had to等。动词原形couldmigh

2、twoulddaredhad tobe able to 能（有人称和时态变化）能（有人称和时态变化）have to 不得不，必须不得不，必须（有人称和时态变化）（有人称和时态变化）had better 最好最好（无人称和时态变化）（无人称和时态变化）dare敢敢（无人称变化，有过去式）（无人称变化，有过去式）need需要需要（无人称和时态变化）（无人称和时态变化）dare和和need作实义动词时，有人称和时态变化。作实义动词时，有人称和时态变化。Finish Ex.I and Ex.II on learning paper.Discuss the answers in groups.选词填空（

3、be able to/can）1.The police are doing all they can to find her.2.You must be able to speak French for this job.3.This time I failed the exam,but Ill be able to pass the exam next time.4.The fire was very big,but most people were able to escape from it.5.I cant give you details because I dont actuall

4、y have any details.can be able tobe able towere able tocant6.He wont be able to come again tomorrow because he is busy.7.When he was young,he could swim very fast.8.Im sorry I havent been able to answer your letter in time.9.He said that Tom wast able to/couldnt get there on time because he got up l

5、ate.10.Farming produced more food per person than hunting and gathering,so people were able to raise more children.wont be able tocouldhavent been able towasnt able to/couldntto raise一句多译一句多译她晚上不敢一个人出去。1.She dare not go out alone at night.(dare作情态动词)2.She doesnt dare to go out alone at night.(dare作实

6、义动词)她晚上敢一个人出去吗？3.Dare she go out alone at night?(dare作情态动词)4.Does she dare to go out alone at night?(dare作实义动词)dare notdoesnt dare toDare sheDoes she dare to完成句子完成句子5.He wanted to ask her,but he dared not/didnt dare.(不敢)6.I dare say（我认为）you have known about it already.7.How dare you use（你竟敢用）my car

7、without asking!dared not/didnt dareI dare sayHow dare you use选词填空&完成句子（have to/must）1.This book must not be removed from the library.2.Jackie is ill so they have to change their plans.3.She must do it herself（必须自己做）.I wont help her.4.She has to do it herself（不得不自己做）.She has got no one to help her.5.

8、You mustnt say（千万别说）things like that.6.You dont have to say（不必说）thins like that to me.must have tomust do it herselfhas to do it herselfmustnt saydont have to say完成句子（had better）1.I think you had better go to the doctor（最好去找医生看看）about your cough.2.We had better leave now（最好现在就走）or well miss the bus.

9、3.Before getting the drivers license,you had better not drive（最好不要驾驶）the car on the road.had better go to the doctorhad better leave nowhad better not drive 1.Grandpa_ to water the flowers now.Its going to rain soon.A isnt needing B neednt C doesnt need D needs 2.Tom will help you finish the work on

10、 time,so you _ worry about it.A dont need B neednt C not need D neednt to 3.John,you _ do your homework today,Leave it for tomorrow.A neednt to B dont need C dont need to D havent toCBD 4.Since you are very tired,you _ finish the work today.A dont need B need to C not need D neednt 5.We will help yo

11、u to finish the cleaning on time,so you _ worry about it.A neednt to B dont need C not need D neednt 6.Parents _ pay for the nine years education in China.A neednt to B dont need C dont have to D neednt haveDDC 7.They _ help then.They managed to do it by themselves.A didnt need any B didnt need to C

12、 neednt any D didnt need to any 8.I will help you,so you _ worry about it.A dont need B neednt to C neednt D not need 9.There was much time.You _.A.neednt have hurried B.couldnt have hurriedC.didnt need to hurry D.mustnt have hurrieACA 10.Dont feed the fish too often for they _ much food.A dont need

13、 B neednt C neednt to D dont need to 11.This exercise is not difficult.I _ any help.A neednt B need C need not to D dont need 12.We _ any milk shake.Lets buy some coke instead.A neednt B neednt to C dont need D needAAA迁移运用 1.Finally I was able to persuade Jenny to attend our wedding.2.Afraid of wate

14、r,I wonder if I dare jump into the pool and swim.3.I dont want to attend the meeting,but I have to,because its required by the director.4.He has to/had better/need be sent to hospital,as hes seriously ill.5.You neednt/dont have to worry before you go to the new school,for your classmates there will

15、be very friendly.was able todarehave tohas to/had better/needneednt/dont have to 6.You need not come to the meeting if youre too busy.7.You dont have to buy a gift,but you can if you want to.8.You had better not go to school without breakfast for its bad for your health.9.Id like to do more gardenin

16、g,but I am not able to find the time.10.We neednt/dont have to take any food to the party as Sue will get everything ready.needhave tohad better not am not able toneednt/dont have toFrom:AnnaJTo:Gary Newlands Subject:Travel tipsGary,I know you havent done such a long flight before so I thought I(1)g

17、ive you a few tips.First,you(2)_ make sure you get to the airport really early because you always(3)_ spend ages getting through security.You(4)_ be prepared for them to open all your hand luggage too.Your flight is an early one so,with luck,you(5)_ be able to get a seat in the business lounge.You(6

18、)_ (not)pay for breakfast as its free there.When your flights called,you(7)_ start moving Complete the email with“had better,should”or“have to”.Sometimes there is more than one answer.shouldhad betterhave toshoulddont have todont have tohad betterto the gate immediately because sometimes you(8)_walk

19、 for about fifteen minutes.You(9)_(not)take very heavy hand luggage because you(10)_carry it yourself and you cant take a trolley to the gates.Everyone agrees there(11)_be some,of course,but there arent.You get a meal on the fight of course,and you(12)_ eat it even if it doesnt taste very interesting,because theres nowhere to eat until you reach your hotel at the other end.If you have any questions,email me.Regards,Annahave tohad better nothave toshouldhave toThank you