初中情态动词讲解PPT课件
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may 也表示猜测，意为“可能”。
3) Where is my English book? It might / may be in your desk.
Ⅰ.用适当的情态动词填空：
1. I can play football. ____C__a_n___you swim? 2. I can’t play with you. I ___m_u__s_t___finish my
Learning goals:
1 复习部分情态动词的用法 2 情态动词的新用法—情态动词表示推测 3 对物品的归属进行猜测
➢ 思考？
1 你记得学过哪些主要的情态动词吗？
can. could, may, must，might, have to…
2 情态动词有哪些语法特征呢？
1. 情态动词有具体的词义。 2. 情态动词没有人称和数的变化。 3. 情态动词后必须跟动词原形，两者
homework first.
3. I___m__u_s_t___ get up early tomorrow. because I
have a meeting.
4. Nobody ___c_a__n_____live without air.
5.__M__a_y_____I come in ?Yes ,please.
2. --May I use your washroom now?
--No, you ___B___. There’s something wrong with the
toilet.
A. needn’t B. mustn’t C. shouldn’t D. didn’t
must / must not
一起构成谓语动词。 4. 一般疑问句提前边，
否定句在后直接加 not.
3 情态动词如何使用呢？
can / can not
1. 表示能力 (会)
1) Mary can speak English, but she can not speak
French.
2) Can you lift this heavy box?
No, you __d_o_n_’_t_h_a_v_e_to_ .
need
need作情态动词，主要用于疑问句和否定句中
need 一般疑问句: 肯定回答用 Yes, … must， 否定回答用 No,…needn’t . 或 No,…don’t have to.
如： Need I do it now? Yes, you __m_u_s_t___。 No, you _n_e_e_d_n_’t_/_d_o_n_’_t _h_a_ve__to__ .
3) Can you skate? 2. 表示允许 (可以)
1）Can I use your dictionary? 2）----- Can I go home now?
----- Yes, you can. / No, you can’t.
could
1. 是can 的过去式； 表示过去的能力；
He could ride a bike at the age of five.
6. _C__o_u_l_d____you please tell me where the
station is ?
7. Must I finish the work now ?
No, you __n_e_e_d__n_’t___.
8. --Need I take this book out? --Yes , you __D___ . A. can B. may C. need D. must
can’t。
may / may not
may的用法: 1. 表示请求和允许 (可以), 比can 正式.
May I come in? He may come if he likes.
may / may not
may的一般疑问句，其否定回答用 can’t 或
mustn’t。
1. --May I go home now? --Yes, you may. / Sure. / Yes, please. No, you can’t./ mustn’t.
must / must not
以must开头的疑问句，
肯定回答：Yes , …must.
否定回答: No, … needn’t. 或 No, … don’t have to.
-- Must I clean the classroom now? -- Yes, you___m_u_s_t_ . -- No, you __n_e_e_d_n_’t__ . /
must 的用法:
must 必须 ,表示说话人的 主观意志。 You must do your homework first.
Baidu Nhomakorabea
must / must not
must not的用法: mustn’t 表示禁止 ，不准，不允许。 You mustn’t smoke here.
You mustn’t play with fire.
9. __D____ the girl read before she went to school? A. Can B. Must C. Can D. Could
He is a singer and actor, he is known by everyone.
need 作行为动词，有人称、数和时态的 变化后接to do， 即 need to do sth.
might / may
might 1. 是 may 的过去式。
2. 表示推测, 可能性较小。 1) He might be very busy now. 2) Your mother might know the truth.
2. 用于婉转语气,多用于问句。“能，可以” Could you please clean the room?
---- Could I come to see you tomorrow? ---- Yes, you can. ( No, you can’t. )
此处 could 不是过去式，只是语气更委婉， 答语中不能用could和 couldn’t，要用can 和
3) Where is my English book? It might / may be in your desk.
Ⅰ.用适当的情态动词填空：
1. I can play football. ____C__a_n___you swim? 2. I can’t play with you. I ___m_u__s_t___finish my
Learning goals:
1 复习部分情态动词的用法 2 情态动词的新用法—情态动词表示推测 3 对物品的归属进行猜测
➢ 思考？
1 你记得学过哪些主要的情态动词吗？
can. could, may, must，might, have to…
2 情态动词有哪些语法特征呢？
1. 情态动词有具体的词义。 2. 情态动词没有人称和数的变化。 3. 情态动词后必须跟动词原形，两者
homework first.
3. I___m__u_s_t___ get up early tomorrow. because I
have a meeting.
4. Nobody ___c_a__n_____live without air.
5.__M__a_y_____I come in ?Yes ,please.
2. --May I use your washroom now?
--No, you ___B___. There’s something wrong with the
toilet.
A. needn’t B. mustn’t C. shouldn’t D. didn’t
must / must not
一起构成谓语动词。 4. 一般疑问句提前边，
否定句在后直接加 not.
3 情态动词如何使用呢？
can / can not
1. 表示能力 (会)
1) Mary can speak English, but she can not speak
French.
2) Can you lift this heavy box?
No, you __d_o_n_’_t_h_a_v_e_to_ .
need
need作情态动词，主要用于疑问句和否定句中
need 一般疑问句: 肯定回答用 Yes, … must， 否定回答用 No,…needn’t . 或 No,…don’t have to.
如： Need I do it now? Yes, you __m_u_s_t___。 No, you _n_e_e_d_n_’t_/_d_o_n_’_t _h_a_ve__to__ .
3) Can you skate? 2. 表示允许 (可以)
1）Can I use your dictionary? 2）----- Can I go home now?
----- Yes, you can. / No, you can’t.
could
1. 是can 的过去式； 表示过去的能力；
He could ride a bike at the age of five.
6. _C__o_u_l_d____you please tell me where the
station is ?
7. Must I finish the work now ?
No, you __n_e_e_d__n_’t___.
8. --Need I take this book out? --Yes , you __D___ . A. can B. may C. need D. must
can’t。
may / may not
may的用法: 1. 表示请求和允许 (可以), 比can 正式.
May I come in? He may come if he likes.
may / may not
may的一般疑问句，其否定回答用 can’t 或
mustn’t。
1. --May I go home now? --Yes, you may. / Sure. / Yes, please. No, you can’t./ mustn’t.
must / must not
以must开头的疑问句，
肯定回答：Yes , …must.
否定回答: No, … needn’t. 或 No, … don’t have to.
-- Must I clean the classroom now? -- Yes, you___m_u_s_t_ . -- No, you __n_e_e_d_n_’t__ . /
must 的用法:
must 必须 ,表示说话人的 主观意志。 You must do your homework first.
Baidu Nhomakorabea
must / must not
must not的用法: mustn’t 表示禁止 ，不准，不允许。 You mustn’t smoke here.
You mustn’t play with fire.
9. __D____ the girl read before she went to school? A. Can B. Must C. Can D. Could
He is a singer and actor, he is known by everyone.
need 作行为动词，有人称、数和时态的 变化后接to do， 即 need to do sth.
might / may
might 1. 是 may 的过去式。
2. 表示推测, 可能性较小。 1) He might be very busy now. 2) Your mother might know the truth.
2. 用于婉转语气,多用于问句。“能，可以” Could you please clean the room?
---- Could I come to see you tomorrow? ---- Yes, you can. ( No, you can’t. )
此处 could 不是过去式，只是语气更委婉， 答语中不能用could和 couldn’t，要用can 和