初中情态动词讲解PPT
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small for him.
精品PPT
用must, could, can’t, might填空。
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__ . /
It might/ could be____.
精品PPT
He is a singer and actor, he is known by everyone.
Whose dog is this?
It might/ could be____. It must be Liu Dehua’s.
精品PPT
An actor, he is tall, cool and popular.
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
精品PPT
➢ 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
精品PPT
6. _C_a_n__that wallet yours? --No, it _c_a_n_’_t __be mine. Mine is here.
7.The pen_m__ig_h_t_/_c_o_u_l_d belong to him. It’s on his desk.
8.My mother __c_a_n__’t___ be at home. She left home
精品PPT
might, could 表示推测
语气更委婉，表示的可能性较小，说话中留 有余地，意为“可能，也许，或许”。
1. The football might / could be Jack’s. He likes all kinds of ball games.
2. Liu Mei isn’t here today. She might / could be ill.
He could ride a bike at the age of five.
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
can’t。
精品PPT
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.
精品PPT
can’t 意为“不可能”, 必用在否定句中。 -- The man can’t be Mr. Green. -- He has gone to America.
精品PPT
活动探究
情态动词must, might, could, can’t 表示推测 的含义与用法。
情态动词must, might, could, can’t 后面都接 动词原形，都可以表示对现在情况的揣测或推断， 但他们的含义有所不同：
精品PPT
He is rich but helpful.
Whose car is this?
It might/ could be _____. It can’t be _______. It must be_________. 精品PPT
He is rich but helpful.
Whose car is this? It might/ could be _____. It can’t be _m__i_n_e__.
must 一定，肯定 （100%的可能性）
might, could 有可能，也许（20%~80%的可能性）
can’t 不可能，不会（精可品PPT能性几乎为零）
意思
推测程度
must 一定，肯定 用于非常确定的推测
may
有可能，
might 也许 /could
用于不确定的推测
can/ 不可能， 在疑问句和否定句中
I must be B__il_l _G__a_t_e.s’ 精品PPT
➢ 情态动词表推测讲解
must 表示推测 must 表示非常肯定的或有把握的推测， 意为“一定，必定”。 只用在肯定句中，不能用于否定句中。
Eg. You have worked hard all day. You must be tired.
--No, you ___B___. There’s something wrong with the
toilet.
A. needn’t B. mustn’t C.精s品hPPoTuldn’t D. didn’t
must / must not
must 的用法: must 必须 ,表示说话人的 主观意志。
may 也表示猜测，意为“可能”。
3) Where is my English book? It might / may be in your desk.
精品PPT
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
Whose dog is this?
It might / could be___.
精品PPT
An actor, he is tall, cool and popular.
Whose dog is this?
It might / could be___.
It must be Zhang Han’s.
1.The storybook__m_u_s_t _ be hers. It has her name on it.
2.The beautiful trousers _c_a_n_’t__ be Lily’s. Because
they’re too long.
3.I can’t find my key. It__c_o_u_ld_/m__ig_h_t__ be left at home. 4.The volleyball__m_ig_h_t_/c_o_u_ld__ be Sally’s or Ann’s. They both like playing volleyball. 5.The piano__m__ig_h_t/_c_o_u_ld__ belong to Alice. She often plays the piano.
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？
精品PPT
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_ . 精品PPT
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__ .
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.
精品PPT
5.__M__a_y_____I come in ?Yes ,please.
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.
精品PPT
could
1. 是can 的过去式； 表示过去的能力；
can’t 不会
表推测
精品PPT
情态动词表示推测 常考的有：
must, could, might, can’t
对某事判断的程度：
must ＞ could ＞ might ＞ can’t
精品PPT
精品PPT
Choose must , might, could, can’t , can to fill in the blanks.
You must do your homework first.
精品PPT
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.
精品PPT
must / must not
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
9. __D____ the girl read before she went to school? A. Can B. Must C. Ca精n品PPTD. Could
精品来自百度文库PT
精品PPT
He is a singer and actor, he is known by everyone.
Whose dog is this?
need 作行为动词，有人称、数和时态的 变化后接to do， 即精品nPPeTed 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.
精品PPT
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.
2. --May I use your washroom now?
精品PPT
He is a basketball player. Whose car is this?
It might / could be __.
精品PPT
He is a basketball player. Whose car is this?
It might / could be __.
It must beY__ao__M__in_g_’s_. It can’t be _m__i_n_e____.
with me. She has gone to go to work.
9.This basketball _c_o_u_l_d_/_m__ig_h_t_ be Ning’s. He plays basketball every day.
10.This school uniform __c_a_n_’_t___ be Nick’s. It’s too
精品PPT
用must, could, can’t, might填空。
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__ . /
It might/ could be____.
精品PPT
He is a singer and actor, he is known by everyone.
Whose dog is this?
It might/ could be____. It must be Liu Dehua’s.
精品PPT
An actor, he is tall, cool and popular.
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
精品PPT
➢ 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
精品PPT
6. _C_a_n__that wallet yours? --No, it _c_a_n_’_t __be mine. Mine is here.
7.The pen_m__ig_h_t_/_c_o_u_l_d belong to him. It’s on his desk.
8.My mother __c_a_n__’t___ be at home. She left home
精品PPT
might, could 表示推测
语气更委婉，表示的可能性较小，说话中留 有余地，意为“可能，也许，或许”。
1. The football might / could be Jack’s. He likes all kinds of ball games.
2. Liu Mei isn’t here today. She might / could be ill.
He could ride a bike at the age of five.
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
can’t。
精品PPT
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.
精品PPT
can’t 意为“不可能”, 必用在否定句中。 -- The man can’t be Mr. Green. -- He has gone to America.
精品PPT
活动探究
情态动词must, might, could, can’t 表示推测 的含义与用法。
情态动词must, might, could, can’t 后面都接 动词原形，都可以表示对现在情况的揣测或推断， 但他们的含义有所不同：
精品PPT
He is rich but helpful.
Whose car is this?
It might/ could be _____. It can’t be _______. It must be_________. 精品PPT
He is rich but helpful.
Whose car is this? It might/ could be _____. It can’t be _m__i_n_e__.
must 一定，肯定 （100%的可能性）
might, could 有可能，也许（20%~80%的可能性）
can’t 不可能，不会（精可品PPT能性几乎为零）
意思
推测程度
must 一定，肯定 用于非常确定的推测
may
有可能，
might 也许 /could
用于不确定的推测
can/ 不可能， 在疑问句和否定句中
I must be B__il_l _G__a_t_e.s’ 精品PPT
➢ 情态动词表推测讲解
must 表示推测 must 表示非常肯定的或有把握的推测， 意为“一定，必定”。 只用在肯定句中，不能用于否定句中。
Eg. You have worked hard all day. You must be tired.
--No, you ___B___. There’s something wrong with the
toilet.
A. needn’t B. mustn’t C.精s品hPPoTuldn’t D. didn’t
must / must not
must 的用法: must 必须 ,表示说话人的 主观意志。
may 也表示猜测，意为“可能”。
3) Where is my English book? It might / may be in your desk.
精品PPT
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
Whose dog is this?
It might / could be___.
精品PPT
An actor, he is tall, cool and popular.
Whose dog is this?
It might / could be___.
It must be Zhang Han’s.
1.The storybook__m_u_s_t _ be hers. It has her name on it.
2.The beautiful trousers _c_a_n_’t__ be Lily’s. Because
they’re too long.
3.I can’t find my key. It__c_o_u_ld_/m__ig_h_t__ be left at home. 4.The volleyball__m_ig_h_t_/c_o_u_ld__ be Sally’s or Ann’s. They both like playing volleyball. 5.The piano__m__ig_h_t/_c_o_u_ld__ belong to Alice. She often plays the piano.
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？
精品PPT
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_ . 精品PPT
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__ .
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.
精品PPT
5.__M__a_y_____I come in ?Yes ,please.
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.
精品PPT
could
1. 是can 的过去式； 表示过去的能力；
can’t 不会
表推测
精品PPT
情态动词表示推测 常考的有：
must, could, might, can’t
对某事判断的程度：
must ＞ could ＞ might ＞ can’t
精品PPT
精品PPT
Choose must , might, could, can’t , can to fill in the blanks.
You must do your homework first.
精品PPT
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.
精品PPT
must / must not
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
9. __D____ the girl read before she went to school? A. Can B. Must C. Ca精n品PPTD. Could
精品来自百度文库PT
精品PPT
He is a singer and actor, he is known by everyone.
Whose dog is this?
need 作行为动词，有人称、数和时态的 变化后接to do， 即精品nPPeTed 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.
精品PPT
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.
2. --May I use your washroom now?
精品PPT
He is a basketball player. Whose car is this?
It might / could be __.
精品PPT
He is a basketball player. Whose car is this?
It might / could be __.
It must beY__ao__M__in_g_’s_. It can’t be _m__i_n_e____.
with me. She has gone to go to work.
9.This basketball _c_o_u_l_d_/_m__ig_h_t_ be Ning’s. He plays basketball every day.
10.This school uniform __c_a_n_’_t___ be Nick’s. It’s too