人教版高中英语必修三Unit1GrammarPPT课件
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2020/11/27
may and might
➢2） 表示许可（permission），表示允许别 人做某事， 也可征求对方的许可。
➢He may go now. ➢We may keep the book for two weeks. ➢3） 用于祈使句，表示祝愿。 ➢May you succeed! ➢May you have a nice trip!
wenku.baidu.com
表示猜测(不可能)
➢7. They (can not/may not) ___c_a_n_n_o_t_______ still be out, the light is on in the house.
➢8. You (couldn’t/might not) 表示许可
may and might
➢1） 表示可能性（possibility）,用于对现在 ，过去或将来的推测，暗示不确定。might 不是may的过去式，它所表示的可能性比 may 小，含较多的怀疑。
➢He may be very busy now. (可能性较大) ➢He might be very busy now. (可能性较小)
----Yes, of course. You can. ➢ Do you think I could borrow your bike? (permission)
2020/11/27
can and could
➢ 3) 表示可能性 （possibility） ➢ a. can 表示泛指的“可能”，并非说话者主观认为的
can and could
➢ 2) 表示请求（request）或（permission)意为“可 否”、“可以”。 Could 比can 更有礼貌，在此不 是can的过去式。
➢ Can you wait a moment please? ➢ Liz, can you do me a favor? ➢ Excuse me, could you tell me the way to the station? ➢ I wonder if you could help me. (request) ➢ ---- Could I use your phone?
➢ 5. (may/can) ____c_a_n_____you swim? 表示能力
➢ 6. Listen, please. You (may not/might not)
____m__a_y__n_o_t______ speak during this exam.
表示不允许
2020/11/27
may, might, can, could
2020/11/27
can and could
➢ 1) 表示能力（ability），指有能力做某事，意为 “能够”。例如：
➢ 注意：表示现在，将来“能够”可用be able to 替 换。表示过去“能够”并成功了只能用was/ were able to, 不能用could。例如
➢ My grandma is over eighty, but she can/ is able to read without glasses.
➢ can and could ➢ may and might ➢ will and would ➢ shall and should ➢ must and can’t
2020/11/27
can and could
➢So he can carry heavy books. ➢ability ➢He couldn't open the door by himself. ➢ability ➢Could you open the door, please? ➢request
2020/11/27
may and might
➢He may be in his office. =( perhaps he is in his office.)
➢He might be having lunch. =( perhaps he is having lunch.)
2020/11/27
Unit 1 Festivals around the world Grammar
情态动词（Modal Verbs)
➢ 情态动词表示说话人对某一动作或状态的态度， 认为“可能”、“应当”、“必要”等等。但本 身词义不完全，不能单独作谓语动词，必须和不 带to的不定式（即动词原形）连用。情态动词没 有人称和书的变化。
wish.
表示请求
➢ 3. (could/may) __c_o_u_l_d____you open the window a
bit, please?
表示猜测
➢ 4. He (can/could) __c_o_u_l_d____be from America,
judging by his accent.
可能性，即并非说话者的主观猜测。 ➢ Accident can happen to any drunken driver. ➢ b.表示说话者主观猜测，只能用与否定句或疑问
句中。例如： ➢ It can’t be my father. He is now in England. ➢ ----Can it rain tomorrow? ➢ ----No, it can’t.
2020/11/27
may, might, can, could
表示猜测
➢ 1. They (can/might) ____m_i_g_h_t___be away for the
weekend but I’m not sure.
表示许可
➢ 2. You (may/might) ___m__a_y____leave now if you
➢ We can/ will be able to talk about the matter later. ➢ I talked with her for a long time, and at last I was able
to make her believe me.(不能用could)
2020/11/27
may and might
➢2） 表示许可（permission），表示允许别 人做某事， 也可征求对方的许可。
➢He may go now. ➢We may keep the book for two weeks. ➢3） 用于祈使句，表示祝愿。 ➢May you succeed! ➢May you have a nice trip!
wenku.baidu.com
表示猜测(不可能)
➢7. They (can not/may not) ___c_a_n_n_o_t_______ still be out, the light is on in the house.
➢8. You (couldn’t/might not) 表示许可
may and might
➢1） 表示可能性（possibility）,用于对现在 ，过去或将来的推测，暗示不确定。might 不是may的过去式，它所表示的可能性比 may 小，含较多的怀疑。
➢He may be very busy now. (可能性较大) ➢He might be very busy now. (可能性较小)
----Yes, of course. You can. ➢ Do you think I could borrow your bike? (permission)
2020/11/27
can and could
➢ 3) 表示可能性 （possibility） ➢ a. can 表示泛指的“可能”，并非说话者主观认为的
can and could
➢ 2) 表示请求（request）或（permission)意为“可 否”、“可以”。 Could 比can 更有礼貌，在此不 是can的过去式。
➢ Can you wait a moment please? ➢ Liz, can you do me a favor? ➢ Excuse me, could you tell me the way to the station? ➢ I wonder if you could help me. (request) ➢ ---- Could I use your phone?
➢ 5. (may/can) ____c_a_n_____you swim? 表示能力
➢ 6. Listen, please. You (may not/might not)
____m__a_y__n_o_t______ speak during this exam.
表示不允许
2020/11/27
may, might, can, could
2020/11/27
can and could
➢ 1) 表示能力（ability），指有能力做某事，意为 “能够”。例如：
➢ 注意：表示现在，将来“能够”可用be able to 替 换。表示过去“能够”并成功了只能用was/ were able to, 不能用could。例如
➢ My grandma is over eighty, but she can/ is able to read without glasses.
➢ can and could ➢ may and might ➢ will and would ➢ shall and should ➢ must and can’t
2020/11/27
can and could
➢So he can carry heavy books. ➢ability ➢He couldn't open the door by himself. ➢ability ➢Could you open the door, please? ➢request
2020/11/27
may and might
➢He may be in his office. =( perhaps he is in his office.)
➢He might be having lunch. =( perhaps he is having lunch.)
2020/11/27
Unit 1 Festivals around the world Grammar
情态动词（Modal Verbs)
➢ 情态动词表示说话人对某一动作或状态的态度， 认为“可能”、“应当”、“必要”等等。但本 身词义不完全，不能单独作谓语动词，必须和不 带to的不定式（即动词原形）连用。情态动词没 有人称和书的变化。
wish.
表示请求
➢ 3. (could/may) __c_o_u_l_d____you open the window a
bit, please?
表示猜测
➢ 4. He (can/could) __c_o_u_l_d____be from America,
judging by his accent.
可能性，即并非说话者的主观猜测。 ➢ Accident can happen to any drunken driver. ➢ b.表示说话者主观猜测，只能用与否定句或疑问
句中。例如： ➢ It can’t be my father. He is now in England. ➢ ----Can it rain tomorrow? ➢ ----No, it can’t.
2020/11/27
may, might, can, could
表示猜测
➢ 1. They (can/might) ____m_i_g_h_t___be away for the
weekend but I’m not sure.
表示许可
➢ 2. You (may/might) ___m__a_y____leave now if you
➢ We can/ will be able to talk about the matter later. ➢ I talked with her for a long time, and at last I was able
to make her believe me.(不能用could)
2020/11/27