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1、语语 法法 点点 击击实实 战战 演演 练练单元语法聚焦八单元语法聚焦八语语 法法 点点 击击情态动词表示推测情态动词表示推测 1 1must表示对现在的状态或现在正在发生的事情的推测，表示对现在的状态或现在正在发生的事情的推测，后面通常接系动词后面通常接系动词be be 的原形。如：的原形。如：You have studied for five hours.You must be tired.你已经学习五个小时了，一定累了。你已经学习五个小时了，一定累了。Our teacher must be marking our exam papers.我们的老师一定在批阅我们的试卷。我们的老师一定在批
2、阅我们的试卷。“must have done”表示对过去发生的事进行有把握表示对过去发生的事进行有把握的推测或判断的推测或判断.I think somebody must have picked it up.我想肯定有人捡起了它。我想肯定有人捡起了它。单元语法聚焦八单元语法聚焦八2 2“may/might/could动词原形动词原形”多用于肯定句，其多用于肯定句，其“推测，推测，判断判断”的语气不确定。的语气不确定。maymay意为意为“也许，可能也许，可能”；might不表示过不表示过去时态，只表示语气较去时态，只表示语气较may更弱，意为更弱，意为“或许，大概或许，大概”。如：。如：I d
3、ont know where she is.She may be in New York.我不知道她在哪儿，她可能在纽约。我不知道她在哪儿，她可能在纽约。The guitar might be Janes.She plays the guitar.这把吉他可能是简的。她弹吉他。这把吉他可能是简的。她弹吉他。It could be Meis hair band.它可能是梅的发带。它可能是梅的发带。单元语法聚焦八单元语法聚焦八3 3“can/could not动词原形动词原形”用于否定句或疑问句中，表用于否定句或疑问句中，表示否定推测或判断，有示否定推测或判断，有“不可能不可能”之意。用之意。用c
4、ant还是用还是用couldnt，不存在时态差异，只是，不存在时态差异，只是cant的语气较的语气较couldnt强。如：强。如：There is no light in the room.She cant be at home now.房间里没有灯光。她现在不可能在家里。房间里没有灯光。她现在不可能在家里。That man cant be Mr.Black.He is much taller.那个人不可能是布莱克先生。他高得多。那个人不可能是布莱克先生。他高得多。4,“情态动词情态动词be doing”对正在发生的事情进行推测。对正在发生的事情进行推测。He could be running
5、 for exercise.他可能是在跑步锻炼。他可能是在跑步锻炼。He might be running to catch a bus.他可能是在跑着赶公共汽车。他可能是在跑着赶公共汽车。I must be dreaming.我肯定在做梦。我肯定在做梦。They must be making a movie.他们一定是在拍电影。他们一定是在拍电影。单元语法聚焦八单元语法聚焦八()1.2014上海上海 All passengers _ go through safety check before they take a plane.Acan Bmay Cmust Dought()2.2014曲
6、靖曲靖 Frank will have his birthday party tomorrow.It _ be!He had it yesterday.Acant Bmust Cmay Dneednt C 实 战 演 练A()3.Whose Tshirt is this?It _ be Daves.Its much too small for him.Amust Bmustnt Ccant Dcan()4.2014常州常州 How nice that Lucy has been invited to the party too!Well,Lucy_ not come.She is not ce
7、rtain whether her mother will allow her to.Amight BWould Cmust DneedC A 单元语法聚焦八单元语法聚焦八()5.Listen!Is that Kate playing the piano in the room?No,it _ be her.She has gone to London with her parents.Amay notBneedntCmustnt Dcant()6.Susan has bought a large house with a swimming pool.It _ be very expensiv
8、e.I never even dream about it.Amust BmightCcant Dshouldnt D A 单元语法聚焦八单元语法聚焦八()7.He _ in his office.I phoned to his office just now,but no one answered.Amay be Bcant beCmustnt be Dneednt beB单元语法聚焦八单元语法聚焦八()8.Where is Jim,please?He _ be in the reading room.I saw him reading there a moment ago.Awill B.
9、need Cwould Dmust()9.2013贺州贺州 The woman who is talking with Mr.Brown_ be Miss Li.She has gone to England.Acant BMust Cmay DmustntD A 单元语法聚焦八单元语法聚焦八()10.20132013广东广东 Someone is knocking at the door.Is it Ann?It_ be her.She is giving a performance at the theater now.Amay BmustCcant Dmustnt C 用所给单词的适当形
10、式填空。用所给单词的适当形式填空。1.The boys are all on the playground.They must_(play)soccer now.2.At this moment,our teacher might_(correct)our exam papers.3.Jim cant _(swim)now.He went shopping with his mother a few minutes ago.4.Look at these people.They are actors.They must_(make)a movie.5.Jims father might be running _(catch)a bus.