初一情态动词语法讲解ppt课件

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能够(表能力
可以(表允许
必须
主) 语 + can + 动词原形
主)语 + may + 主语 + must +
动词原形
动词原形
主语 + cannot/ 主语 + may
主语 + must
can’t + 动词原形 not + 动词原形
not/ mustn’t + 动词原形
Can + 主语 + 动词原形？
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情态动词不能单独作谓语动词，只能与动 词原形一起做谓语，没有人称和数的变 化。
A bird can fly . Fish can’t live without water. You must hand in your homework at once. You mustn’t talk loudly in public.
1.—I don’t understand this word. __M__a_y_/__C_a_n_ I use your
dictionary? --Yes, please use it.
2.The traffic light is turning red. We __m__u__s_t_____ stop. 3.You __m__a__y_/_c_a_n____ borrow two books at a time. 4.Tom ____c_a_n____ play table tennis, but he ___c_a_n_’_t__ play football. must 5.—Doctor, _____________ I tamkeumstuch medicine? --No, you needn’t. But you ___c_a__n________ drink a lot of water. 6.Tom ismgouodstant ’dtr/acwainngn.oHte/_m__a_y__n_o__t_____ draw wonderful
A.must
3.____ you dance? We need some more dancers for the talent show.
A. May
B. Can
C. Must
D. Should
4.I’m afraid I need a pair of glasses. I ______ hardly see the words
on the blackboard.
A. can
B. must
C. may
D. should
5.You ________ cross the road now. You have to wait until the light
need have to
能够 可能 必须
应该 意愿 敢 需要 不得不
+ 动词原形
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Shall一般只能用于第一人称。 I shall think it over and Let you know my idea. 我将考虑一下此事，然后告诉你我的想法。
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否定回答：No, he can’t.
就划线部分提问：What can your elder brother do?
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Practice
2.You ________m_a__y_______ (可以) leave now.
否定句：You may not leave now.
一般疑问句：May I leave now?
May + 主语 + Must + 主语 + 动词原形？ 动词原形？
Yes, 主语 + can.Yes, 主语 + may. No,主语 + can’t.Nnoot,.主语 + may
Yes, 主语 + must. No,主语 + needn’t.
在口语中可用can代替，但may更礼貌。
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B.单项选择：
1.--_______ I ask you a question? --Sure
A. May
B. Do
C. Should
D. Am
2.—Can I go to the park, Mum?
--Certainly. But you ________ be back by six o’clock.
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Practice
1.My elder brother __c_a_n__________(能) drive a car.
否定句：My elder brother cannot/can’t drive a car.
一般疑问句：Can your elder brother drive a car?
肯定回答：Yes, he can.
肯定回答：Yes, you may.
否定回答：No, you may not.
就划线部分提问：When may I leave?
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Practice
3.Lily ________m__u_s_t _____ (必须) go to the library.
否定句：Lily mustn’t go to the library.
pictures.
7.You _______________ smoke here.mIt’as ydannogetrous. 8.--May I turn on the TV? –N最o新, 版y整o理upp_tc_a_n__’t____. My dad is sleep1i1ng.
Test Yourself
一般疑问句：Must Lily go to the library?
肯定回答：Yes, she must.
否定回答：No, she needn’t.
就划线部分提问：Where must Lily go?
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Test Yourself
A.用must(not), may(not), can(not)填空：
Grammar：
Modal verbs 情态动词
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情态动词（modal verbs)：表示说话人的语
气或情态，如请求、命令、愿望、能力以及 可能性等。英语的情态动词有：
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can/could may/might must
shall/should will/would