高三情态动词复习PPT课件

work our this problem. 如果你睡个好觉，那么你就能做出这个题目。 3、表示过去的能力： could表示过去一般的能力， 但不表示做或未做某事；
was/ were able to表示过去有能力并且成功地做了某事， 相当于managed to do something/ succeeded in doing something；
• Mr. Bush is on time for everything. How can it be that he was late for the opening ceremony? (表疑惑、惊讶)
表示请求、允许、允诺
1. 当对方是决策者时，你代表你（们）自己（I， We），或代表第三者（he,she,they）向对方 （you）请示或提出建议时用：
Revision:Modal verbs
情态动词专项复习
How many modal verbs
do you remember?
(情态动词)
一，常见的情态动词有：can, could, may, might ,must, shall, should, will, would, need, have to等
4、具有情态动词的某些特征的有：have(had) to, used to.
情态动词的特征
1、有一定的词义，但不能单独作谓语，它们要和行 为动词或连系动词连用，构成谓语。
2、适用于主语的各种人称和数 have to例外，主语 是第三人称单数时，要用has to）。如：
We/ He must work hard. 我们/他一定要努力工作。 I have to walk home. 我得步行回家。 He has to walk home. 他得步行回家。

— Might I watch TV after supper? — Yes, you ________. A. may B. must C. might D. could
.
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3.表推测，表示主观上的推测，“可能，
也许”，不用于疑问句, might比
may的可能性更小
She may not like this place.
—Yes, he _______. A. need B. must C. may D. will
.
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2. must表示肯定的推测。 The light is still on, so he must be at home.
Look at his new car. He ______ have a lot of money. A. should B. shall C. may D. must
I can’t believe my eyes. Such well-educated
gentleman ____ behave like this!
A.will B. would C. should D. must
What time ought I _______?
A．arrived
B．arriving
C．arrive
D．to arrive
He _______ speak to his mother like that. A．ought not to B．doesn’t ought to C．not ought to D．ought to not
.
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1. should= ought to 表示劝告，建议，意 为“应该”， ought to 语气更强些，强调“有责任，有 义务做”

or uncertain tone It is the past tense of "can"
The Basic Usage of Obligatory Modal Verbs
Must
Expressions opposition or necessity It is used to express a strong recommendation or requirement
Could
Expressions ability or permission in the past or condition
Special Usage of Obligatory Modal Verbs
01
02
03
Must
Expressions opposition or necessity
Should
The basic usage of capability modal verbs
Can
Expressions ability, likelihood, or permission It is used to express capability in the present or future
Could
Can
Expressions ability or possibility
Could
Expressions ability in the past or conditional
Be able to
Expressions ability in the past or conditional
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Analysis of the examination points of

A. can’t B. shan’t C. needn’t D. mustn’t
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may/might
许可
猜测
愿望
May I take photos here?
may/might 的回答
May I take photos here?
Yes, you may. Yes, you can.
No, you can’t No, you mustn’t.
A. can’t leave
B. won’t be leaving
C. could have left
D. must have left
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双子座“need”
He ___go a step further in his experiment. A. need B. needs C. need to D. needs to
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及物动词 动词本身意义不完整，需宾语补充。
他们吃饭。 他们打豆豆。
Eat dinner Bher
暮然回首，那人却在门口小卖部。 for a thousand times。
2
不及物动词
自身意思完整，无需接宾语。
时及时不及
1. must, mustn’t, may, can, shall, should，would的基本用法，尤其是 shall，should的用法
2. 情态动词表推测的用法：
（1）肯定推测语气强弱：must/ may/ can+ do 否定：can’t do/ may not do
3. 情态动词+have done：
推测小结
肯定推测：must/may/might/could 语气：must（十分肯定）＞may（不太肯定）＞might/could（可能性较小）