情态动词中表示推测的用法
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课件14张PPT。高考情态动词考查的热点： 情态动词表示推测的用法 (can/could/may/might/must) 一对现在和将来情况的推测,
形式为： 情态动词+动词原形
二对正在发生的情况的推测
形式为：情态动词+be doing
三 对过去发生情况的推测
形式为：情态动词+have done
1 It is usually warm in my hometown in March, but it ___be rather cold sometimes.(2008 福建）
A must B can C should D would 2 Thank you for all your hard work last week. I
don’t think we ___it without you.(2008 山东)
A can manage B could have managed
C could manage D can have managed
3—Why hasn’t the speaker turned up?
—He ___the flight! I’ll find it out at once.
A must have missed B might have missed
Cmight miss D could miss
× can not不可能可能吗可能 could not不可能可能吗可能 may/might not可能不×一定××Can you tell the difference?一 句式不同 口诀：前提条件：在表示推测时
can 不肯 may(might)不问 must肯定不否问
表示推测?二 意义不同 问题：“一定没有，一定不是”如 何表达？ 一表示对现在和将来情况的推测，
形式：情态动词＋动词原形
1 应用：表示推测时____是正确的句子。
A He can come. B May he come?
CHe could come. D Must he come?
2 特别说明：can用于肯定句中表示推测的情况：
The World Wide Web is sometimes jokingly called the World Wide Wait because it _____be very slow.(2005浙江）
A must B C will D can解释：当表示客观的（理论）可能性，意义为有时可能时，can可以用于肯定句中表示推测。这种用法常常可以说明人或事物的特征。
DshouldC1 You ____be hungry already—you had lunch only two hours ago!(2008 浙江)
A wouldn’t B can’t C mustn’t D needn’t
2—Is there a basketball match between the Lakers and the Huston Rockets this evening?(2008 江苏无锡模拟）
—There___be. I’ll phone the gym and find it out.
A might B C must D would
BAshould二表示对正在发生情况的推测，
形式为：情态动词＋be doing
译为(可能，一定……）正在……
例题：
1______he be watching TV now?
A:Yes,he ____be watching TV now.
B:No, he ____be watching TV now.
A Must; can; mustn’t B Can ; must; can’t
C Can; can; mustn’t D May; must; needn’tB 三 表示对过去发生情况的推测，
形式为情态动词+have done, 译为:过去(可能，不可能,……)
注意could,might +动词原形 表示对______(时间）的推测。现在,将来A: He knows much about Australia.
B:He____ the book The History of Australia.
A could read B could have read
A might read B might have readB1He can’t have lost his way.He got a map with him.
2They could have had a meeting yesterday,but I’m not sure.
3He could have gained full markes, but he was so careless to make a spelling mistake.
4 You were so rude.You may have hurt him.
5He douted,“I might have met her a long time ago.”
6He might have given you more help,but he didn’t.
7This cake is very sweet.You must have put a lot of
sugar in it.
8He mustn’t have sit up too late last night, for he got up early this morning.
三 对过去的推测 情态动词+have done以下8个句子，有一个是错的，请找出并翻译剩余句子×12211三 对过去的推测 情态动词+have done如何区分表示推测的情态动词 (can/could/may/might/must…) 三个方面1 从时间上区分，三段时间表达形式不一样。2 从句式上区分，不同的情态动词所用的句式 不一样。3 从意义上区分，不同情态动词意义不一样。1 It is usually warm in my hometown in March, but it ___be rather cold sometimes.(2008 福建）
A must B can C should D would 2 Thank you for all your hard work last week. I
don’t think we ___it without you.(2008 山东)
A can manage B could have managed
C could manage D can have managed
3—Why hasn’t the speaker turned up?
—He ___the flight! I’ll find it out at once.
A must have missed B might have missed
Cmight miss D could miss
BBB一 课堂练习
二 知识回顾，竞赛1 从时间上区分，三段时间表达形式不一样2 从句式上区分，不同的情态动词所用的句式 不一样。3 从意义上区分，不同情态动词意义不一样。如何做情态动词表推测的题目?1 can 在所有的句式中都能使用 吗？2 should +动词原形可以表示推测吗？3 可以用could do ,might do 表示对过去的猜测吗？4 mustn’t have done 可以使用吗？
5 could have done可以用于肯定句吗？可以表示虚拟吗？
6表示推测的情态动词句式要求是什么？7 如何做情态动词表示推测的题目？抢答题Oversleeping will never make your dream come
true.睡懒觉永远不会使梦想成真。
Bye bye!Homework:
Recite your notes.背诵笔记
形式为： 情态动词+动词原形
二对正在发生的情况的推测
形式为：情态动词+be doing
三 对过去发生情况的推测
形式为：情态动词+have done
1 It is usually warm in my hometown in March, but it ___be rather cold sometimes.(2008 福建）
A must B can C should D would 2 Thank you for all your hard work last week. I
don’t think we ___it without you.(2008 山东)
A can manage B could have managed
C could manage D can have managed
3—Why hasn’t the speaker turned up?
—He ___the flight! I’ll find it out at once.
A must have missed B might have missed
Cmight miss D could miss
× can not不可能可能吗可能 could not不可能可能吗可能 may/might not可能不×一定××Can you tell the difference?一 句式不同 口诀：前提条件：在表示推测时
can 不肯 may(might)不问 must肯定不否问
表示推测?二 意义不同 问题：“一定没有，一定不是”如 何表达？ 一表示对现在和将来情况的推测，
形式：情态动词＋动词原形
1 应用：表示推测时____是正确的句子。
A He can come. B May he come?
CHe could come. D Must he come?
2 特别说明：can用于肯定句中表示推测的情况：
The World Wide Web is sometimes jokingly called the World Wide Wait because it _____be very slow.(2005浙江）
A must B C will D can解释：当表示客观的（理论）可能性，意义为有时可能时，can可以用于肯定句中表示推测。这种用法常常可以说明人或事物的特征。
DshouldC1 You ____be hungry already—you had lunch only two hours ago!(2008 浙江)
A wouldn’t B can’t C mustn’t D needn’t
2—Is there a basketball match between the Lakers and the Huston Rockets this evening?(2008 江苏无锡模拟）
—There___be. I’ll phone the gym and find it out.
A might B C must D would
BAshould二表示对正在发生情况的推测，
形式为：情态动词＋be doing
译为(可能，一定……）正在……
例题：
1______he be watching TV now?
A:Yes,he ____be watching TV now.
B:No, he ____be watching TV now.
A Must; can; mustn’t B Can ; must; can’t
C Can; can; mustn’t D May; must; needn’tB 三 表示对过去发生情况的推测，
形式为情态动词+have done, 译为:过去(可能，不可能,……)
注意could,might +动词原形 表示对______(时间）的推测。现在,将来A: He knows much about Australia.
B:He____ the book The History of Australia.
A could read B could have read
A might read B might have readB1He can’t have lost his way.He got a map with him.
2They could have had a meeting yesterday,but I’m not sure.
3He could have gained full markes, but he was so careless to make a spelling mistake.
4 You were so rude.You may have hurt him.
5He douted,“I might have met her a long time ago.”
6He might have given you more help,but he didn’t.
7This cake is very sweet.You must have put a lot of
sugar in it.
8He mustn’t have sit up too late last night, for he got up early this morning.
三 对过去的推测 情态动词+have done以下8个句子，有一个是错的，请找出并翻译剩余句子×12211三 对过去的推测 情态动词+have done如何区分表示推测的情态动词 (can/could/may/might/must…) 三个方面1 从时间上区分，三段时间表达形式不一样。2 从句式上区分，不同的情态动词所用的句式 不一样。3 从意义上区分，不同情态动词意义不一样。1 It is usually warm in my hometown in March, but it ___be rather cold sometimes.(2008 福建）
A must B can C should D would 2 Thank you for all your hard work last week. I
don’t think we ___it without you.(2008 山东)
A can manage B could have managed
C could manage D can have managed
3—Why hasn’t the speaker turned up?
—He ___the flight! I’ll find it out at once.
A must have missed B might have missed
Cmight miss D could miss
BBB一 课堂练习
二 知识回顾，竞赛1 从时间上区分，三段时间表达形式不一样2 从句式上区分，不同的情态动词所用的句式 不一样。3 从意义上区分，不同情态动词意义不一样。如何做情态动词表推测的题目?1 can 在所有的句式中都能使用 吗？2 should +动词原形可以表示推测吗？3 可以用could do ,might do 表示对过去的猜测吗？4 mustn’t have done 可以使用吗？
5 could have done可以用于肯定句吗？可以表示虚拟吗？
6表示推测的情态动词句式要求是什么？7 如何做情态动词表示推测的题目？抢答题Oversleeping will never make your dream come
true.睡懒觉永远不会使梦想成真。
Bye bye!Homework:
Recite your notes.背诵笔记