1、第三课时 Grammar Focus4c单元语法清肯定句式主语情态动词be动词的过去分词(by.).Teenagers should be allowed to choose their own clothes.青少年应该被允许选择他们自己的服装。否定句式主语情态动词notbe动词的过去分词(by.).The little boy cant be allowed to stay at home alone.不能允许这个小男孩一个人在家。一般疑问句式情态动词主语be动词的过去分词(by.)?肯定回答：Yes，主语情态动词否定回答：No，主语情态动词not.【注意】对含must的一般疑问句作否定回
2、答时应用neednt/dont have to；而对含need的一般疑问句作肯定回答时应用must。Must all the rooms be tidied up？所有的房间都必须整理好吗？Yes，they must.是的，必须整理好。No，they neednt/dont have to.不，不必都整理好。Need he be operated on at once？他需要立即手术吗？Yes，he must.是的，他必须。No，he neednt.不，他不需要。特殊疑问句式(1)疑问副词/代词(不作主语)情态动词主语be动词的过去分词(by.)?(2)疑问代词(作主语)情态动词be动词的过去
3、分词(by.)?When can my computer be repaired？我的电脑什么时候能修好？【拓展】不能用被动语态的几种动词：不及物动词不能用于被动语态。如：die，happen，take place等。感官动词、半连系动词没有被动语态。如：feel，become，get，look，seem等。有些动词用主动形式表被动意义。eg：This pen writes well.这支钢笔很好写。【语法精练】一、单项选择。1.These flowers _ often in the park.Amust waterBmust be wateredCwaterDbe watered2.Pap
4、er shouldnt _ in everyday life.AwasteBwastedCbe wastedDis wasted3.Thanks to the Internet，different kinds of information _ in a short time.Acan be learnedBcan be learningCcan learnDcan have learnedBCA4.(2021湖北黄石)How long may I _ your magazine?For one week.But it mustnt _ to others.Aborrow；lendBkeep；b
5、e lentClend；be borrowedDhave；lend5.(2021湖北襄阳)This math problem _ in half an hour.Dont worry.Mr.Wang is good at math.He can make it.Ais working outBwould work outCshould be worked outDhas worked outBC6.(2021四川达州)Why do some whales have to _？Because humans catch whales for meat，fat and oil.Some of the
6、m are _.Aprotect；dangerousBprotect；endangeredCbe protected；dangerousDbe protected；endangeredD二、按要求完成下列句子。7The work must be done today.(改为一般疑问句)_ the work _ _ today?8We should speak to the old politely.(改为被动语态)The old should _ _ to politely by us.9Nobody can answer the question.(改为同义句)The question _
7、_ _ by anybody.Must be donebe spokencant be answered10The room might be cleaned every day(对画线部分提问)_ _ _ the room _ _11在动物园里不应该喂动物。(汉译英)Animals _ _ _ in the zoo.12有一天我们可能会造访更遥远的行星。(汉译英)Farther planets _ _ _ by us one day.How often might be cleaned?shouldnt be fedmay be visited三、根据短文内容及括号内所给提示词填空。The
8、MidHudson Childrens Museum is designed(设计)for families with youngchildren.Here are some important rules for visitors.Children 13._(must，follow)by an adult when visiting themuseum.Parents 14._(should，use)mobile phones less while visiting themuseum with their own children.Thats because children 15._(s
9、hould，take)good care of by adults.must be followed should useshould be takenYou 16._(can，take)photos of some exhibitions for personaluse.However，you 17._(not，allow)to touch them.Snacks 18._(may，bring)with you，but they 19._(must，eat)in the snack area.Bathrooms in the office areas 20._(can not，use)by
10、the public.There are public restrooms in the eastern corner of each floor.can take are not allowedmay be broughtmust be eatencant be used【课时精练】四、根据句意及括号内的提示填写单词。21I know what you mean，but I can _(应付)it by myself.22Jeff often does some volunteer work in the _(社区)every month.23In modern _(social)，trav
11、eling is a very common thing.24Our teachers always encourage us _(share)our feelings after reading.25The teacher tried his best to help and _(education)the weak boy.managecommunitysocietyto shareeducate五、根据汉语意思完成下列句子。26读了这本书，你就会知道如何照顾你的猫。Read the book，and then you will know how to _ _ _ your cat.27你
12、最好让孩子们远离火。Youd better _ the children _ _ fire.28十二岁的孩子太小了，还不能骑共享单车。_ are _ young _ ride a shared bike.29请给我一个机会，我会给你一个惊喜。Please _ me _ _，and I will give you a wonderful surprise.30我认为青少年应该自己做决定。I think teenagers should _ _ _ _ _ _ _ _take care ofkeep away fromTwelveyearolds too togive a chancemake their own decisions/make decisions by themselves