Unit 6 Using language Modal Verbs（ppt课件）-新外研版（2019）《高中英语》选择性必修第四册.pptx

1、Modal VerbsB7U6 Activity 1 a.Millions watched that first lunar landing aware of the many things that could go wrong.b.The world went into shock,most people having assumed that this space flight would be no more dangerous than travelling in an aeroplane.c.I can remember that day so clearly,watching t

2、he take-off on TV at school,d.The sacrifice of the Challenger calls to us,reminding us that we must continue to reach for the stars,Look at the sentences from the reading passage and answer the questions.1.Which sentence talks about ability?2.Which sentence talks about possibility?3.Which sentence t

3、alks about necessity?4.Which sentence talks about prediction?5.What other modals do you know?1 c 2 a 3 d 4 bGrammar:Modal Grammar:Modal VerbsVerbs1.can/could/be able to 2.may/might 3.shall/should/ought to 4.will/would5.must/have to 6.dare/need 7.ought to/used to/have to8.had better/would rather9.mod

4、.v.+have done10.mod.v.与虚拟语气与虚拟语气情态动词情态动词主要用以表明说话者对某一行为的语气和态度语气和态度。Modal meaning fall into four groups:1 degrees of certainty 确定程度确定程度 It will rain tomorrow.She should be here soon.We may get a new car.It cant be true.2 obligation,freedom to act,recommended behavior,permission,willingness and similar

5、 matters 义务、行动的自由等义务、行动的自由等 Students must register by 30 January.You should see a doctor.Modal meaning fall into four groups:3 ability 能力能力 She can speak Germany.My old car could do 150 kph.4 typical behavior 典型行为典型行为 Dan can really get on your nerves.Most evenings he will sit playing cellphone.can/

6、could/be able to1)can只有现在时和过去时，只有现在时和过去时，be able to可用于各种时态。可用于各种时态。_ he be able to manage such a large company?I expect so.Though he is young,he is both capable andexperienced.A.Can B.Will C.Shall D.Dare2)could表示过去的能力，较抽象；表示过去的能力，较抽象；was/were able to意思是意思是managed to/succeeded,用于具体的或一次性动作。用于具体的或一次性动作

7、。When young,he _ swim across the river in twenty minutes.The fire spread quickly,but luckily everyone _ escape from the building in time.couldwas able to Bcan/could/be able to表示某人在某个场合做了某事通常不用表示某人在某个场合做了某事通常不用could.我昨天在不到一个小时跑了10公里。I managed to run 10 km yesterday in under an hour.即学即用即学即用11.can2.co

8、uldnt3.cannot/cant4.can5.cannot/cantcan/could;may/might might 和could并不常用作may和can 的过去时，它们常用来表示现在和将来，和may 相比，might 和could 表示不太确定或更加犹豫，可能性更小。I may go to London tomorrow.Joe might come with me.can短语短语 cannot help doing cannot help to do cannot but do=cannot help but do=cannot choose but do cannot.too/en

9、ough.情不自禁做某事情不自禁做某事 没办法帮忙做某事没办法帮忙做某事 不得不做某事不得不做某事 再再也不为过也不为过这本书如此有趣，以至于我情不自禁想推荐给你。这本书如此有趣，以至于我情不自禁想推荐给你。The book is so interesting that I cant help recommending it to you.因为这些原因，我们再怎么强调保护海洋都不为过。因为这些原因，我们再怎么强调保护海洋都不为过。For these reasons,we cant emphasize the importance of protecting the oceans too muc

10、h.may/might短语短语may well be may/might as well 愿君成功 愿您多寿多福 祝你新年心想事成。May you succeed.=Wish you success/successful.May you live long and prosper.May the New Year bring you all your heart desires.理应、有足够理应、有足够理由可以理由可以还是做还是做好，倒不如做好，倒不如做即学即用即学即用21.may/might not2.May3.May/Can/Couldshall1 助动词助动词，用于将来时，在第一人称后代

11、替，用于将来时，在第一人称后代替will。过去过去:should。I shall/will write him a letter telling him about our plan.2 情态情态动词动词，用在，用在一一/三三人称前表示人称前表示征求意见征求意见；用在；用在二二/三三人称人称之之后表示后表示允诺、强制、命令、警告及说话人允诺、强制、命令、警告及说话人的决心的决心等。等。Shall we put off the meeting to next week?（）If you dont do as you are told to,you shall fail.（）Whatever yo

12、u want,you shall get it.（）should和ought to均表示“应该、应当应该、应当”，should多表主观主观看法，ought to 则多反映客观客观情况；否定为ought not to征求意见征求意见警告警告承诺承诺should1 应该应该（表示义务、责任、劝告、建议等（表示义务、责任、劝告、建议等）The young should respect the old.(义务，责任义务，责任)2 should(not)/ought(not)to have done 本来本来(不不)应该（表示对过应该（表示对过去行为的责备或后悔）去行为的责备或后悔）You should have told me the news earlier,but you didnt.(责备责备)3 大概大概，估计会，按理应该，估计会，按理应该（表示推测，可能性较大）（表示推测，可能性较大）The new dictionary should be out next month.(推测）推测）Its already 7.He should be here at any moment.(推测推测)Nov.22词汇书 Day34勾画重点完成词汇变形部分；语法通 P202-206。