河北省沙河市二十冶综合学校高中分校高中英语 Unit2 Olympic Games grammar导学案 新人教版必修2

Unit2模态动词2学习目标：掌握本单元的模态动词should，ought to，have to，mustnt，need nt中选择所需的构件。提高阅读理解能力，学习重点：这些情态动词的用法正确。学习困难：区分should和ought to之间的区别。Must和have to之间的区别；Mustnt，neednt中选择所需的构件。学习过程：Task 1:fill in the blanks。请同学们用学过的情态动词填空。1.shehas been coking all the morning .she be tired now。2.dont tell angybody what I said。you _ _ _ _ _ keep it a secret。3.perhaps he is in his office。=he _ _ _ be in his office。4._ _ _ _ _ _ _ _ you like a cup of coffee？5.in China many children _ _ _ _ _ _ _ wear uniform when they go to school。6.you _ _ _ _ _ _ _ _ _ _ _ believe everything you read on the internet。情态动词21.should，ought to可以表示“必须”。Ought to按道理，经常用于表示客观义务或责任，在大多数情况下可以用should代替，但比should to重。I should help her because she is in troubles。You ought to take care of the baby。在表示建议、建议或命令时，should和ought to可能通用，但在疑问句中经常使用should。Ought to的否定是oughtnt to或ought not to。you should/ought to go to class right away。Should I open the window？What should we do next？2.haveto的用法1) must表示主观需要，haveto表示“没有办法”的客观要求。例如：I have to attend an important meeting this afternoon。今天下午我不得不参加一个重要的会议。Mother is out，so I have to look after the shop。妈妈不在家，只好照看商店。2) haveto的否定形式是dont have to。对应于neednt。例如：they don t have to buy a computer at present。他们现在不需要购买电脑。3.must的肯定形式表示“必要”，否定形式表示“禁止，严禁”。You must come here。you mustn t take the book away from the library .task 23360 choose suitable modal verbs below to complete the following dialogues。ought/oughtn t to；should/should n t；Mustn tNeedn t(don t)have to；威尔；Can/cant1 Sam : how can I grow thinner，mum？Mum : well，you _ _ _ _ _ _ _ _ _ eat food with plenty of fibre that helps you digest better。and you _ _ _ _ _ _ stop drinking cola or eating sweet food。Sam 3360 does it mean I _ _ _ _ _ _ _ _ _ _ _ eat my favourite fried chicken anymore？Mum : not exactly，if you love fried chicken，you _ _ _ _ _ _ _ _ give it up . just eat it less often . you _ _ _ _ _ _ _ _ git2 doctor : you are sick because you ve eaton poisonous mush rooms . where did you get them？露茜： I picked them in the forest。I know we _ _ _ _ _ eat fresh vegetables。Doctor : oh，but you _ _ _ _ _ _ _ _ eat them until you re sure they are not poisonous。露西： thank you，doctor。Ill be more careful next time。3查尔斯： I wish I could see things clearly in the dark。Tom : eating carrots _ _ _ _ _ _ help you see better。you _ _ _ _ _ eat some day。任务3:用给定的情态动词填空。MustOughtn t to不要have toCouldn tMustn tNeedn tCan tHave to1.you _ _ _ _ _ _ _ _ _ _ _ _ _ go on working because you lookso tired now。2.the weather turned out to be fine yesterday。I _ _ _ _ _ _ _ have had the troublesto carry my umbrella with me .3.if you earn more than！4.you _ _ _ _ _ _ play now！you shall finish your home work first！5.I know things are hard with you，but you _ _ _ _ _ _ _ _ _ _ try to get over the difficulties。6.I didn t see her at the meeting this morning；she _ _ _ _ _ _ _ _ _ _ _ have spoken at the meeting。Task 4:单选1.I thought you _ _ like something to read，so I have brought you some books。A.may B. might C. would.must2.Where is my pen？I _ it。A.might lose b . would have lost c . should have lost d . must have lost3.I didnt hear the phone .I _ _ asleep。A.must be b . must have been c . should be d . should have been4.is John coming by train？-he should，but he _ _ not。he likes driving his car。(2002年高考问题)A.must b . can c . need d d . may5.I heard they went sking in the mountain ins last winter。-it _ _ _ true because there was little snow there。(2002北京高考试题)A.may not be b . won t be c . could n t be d . mustn t be6.