初中情态动词 ppt课件
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• 1. You shall fail if you don’t work hard.(警告)
Might and may
1) 表示请求和允许。might比 may语气更委婉,而不是过 去式
否定回答时可用can’t 或mustn’t,表示“不可以,禁 止”。
----Might/ May I smoke in this room? ---- No, you mustn’t. ---- May/Might I take this book out of the room? ---- Yes, you can. (No, you can’t / mustn’t. ) • 用May I...?征徇对方许可时比较正式和客气,而用
3) 表推测可能性。
肯定句中:can表示理论上的可能性;may表 示事实上的可能性,如:
In Yuyao, sometimes it can be really cold. Tom may go camping with us tomorrow, but
he is not sure. 否定句和疑问句中,只能用can表猜测可能性。 Someone is knocking at the door, and who
Beijing yesterday. A.needn’t B. can’t C. mustn’t
四、 shall
1) shall 用于第一人称,征求对方的意见。 What shall we do this evening?
shall I clean the room for you?
• 2) shall 用于第二、三人称,表示说话人给对 方的命令、警告、允诺或威胁。
2) 表示请求和允许。
• -----Can I go now?
• ----- Yes, you can. / No, you can’t. 此 时可与may互换。在疑问句中还可用 could, might代替,不是过去式,只是语 气更委婉,不能用于肯定句和答语中。
---- Could I come to see you tomorrow? ---- Yes, you can. ( No, I’m afraid not. )
I’ll not be able to come this afternoon.
• 当表示“经过努力才得以做成功某事”时应 用be able to,不能用Can。如:
He was able to go to the party yesterday evening in spite of the heavy rain.
can it be? It can’t be Tom because he has gone 来自百度文库o
Beijing.
1.(13北京) --__ you sing an English
song?
-- Yes, I can
A.Can B. May C. Must D. Need
2. (13福建) --Is that girl Susan? -- It ___ be her. She left for
3) 表示推测、可能性(不用 于疑问句)。
• might不是过去式,它所表示的可 能性比may小。 1.He may /might be very busy now. 2.Your mother may /might not know the truth.
2.(11安徽) –May I go out now,Dad? -No. You ___ let your mother know First. A.can B. may C. need D. must 3. (13年湖北) –Must I go there with You? --No, you ___. David ___ go there with you. A.mustn’t; can B. can’t; must C. don’t; should D. needn’t; may
1.(13江西) There’s only one day to Go. You ___ finish your work by Tomorrow. A.can B. will C. must D. may
2. (11江苏) Fifty dollars for a TShirt! You ___ be joking! A. must B. need C. may D. can
情态动词专项练习
By Steven
1. must
You must come in time. 1) 表示必须、必要。是说话人的主观看法 在回答引出的问句时,如果是否定的,
不能用mustn’t(禁止,不准),而用 needn’t, don’t have to(不必).
-- Must we hand in our exercise books today?
-- Yes, you must. -- No, you don’t have to / you needn’t.
1. must
– You’re Tom’s good friend, so you must know what he likes best.
2) 表示推测、可能性(只用于肯 定的陈述句)
Can I...?在口语中更常见。
2)用于祈使句,表示祝愿。
May you succeed!
1.(13河北) ___ I see your ID card, sir? We have to check your
information. A. May B. Must C. Should D.
Need
三、can, could
Can you lift this heavy box?(体力) Mary can speak three languages.(知识) Can you skate?(技能) 1) 表示能力(体力、知识、技能)。
• 此时可用be able to代替。Can只有一般现在 时和一般过去式;而be able to则有更多的时 态。
Might and may
1) 表示请求和允许。might比 may语气更委婉,而不是过 去式
否定回答时可用can’t 或mustn’t,表示“不可以,禁 止”。
----Might/ May I smoke in this room? ---- No, you mustn’t. ---- May/Might I take this book out of the room? ---- Yes, you can. (No, you can’t / mustn’t. ) • 用May I...?征徇对方许可时比较正式和客气,而用
3) 表推测可能性。
肯定句中:can表示理论上的可能性;may表 示事实上的可能性,如:
In Yuyao, sometimes it can be really cold. Tom may go camping with us tomorrow, but
he is not sure. 否定句和疑问句中,只能用can表猜测可能性。 Someone is knocking at the door, and who
Beijing yesterday. A.needn’t B. can’t C. mustn’t
四、 shall
1) shall 用于第一人称,征求对方的意见。 What shall we do this evening?
shall I clean the room for you?
• 2) shall 用于第二、三人称,表示说话人给对 方的命令、警告、允诺或威胁。
2) 表示请求和允许。
• -----Can I go now?
• ----- Yes, you can. / No, you can’t. 此 时可与may互换。在疑问句中还可用 could, might代替,不是过去式,只是语 气更委婉,不能用于肯定句和答语中。
---- Could I come to see you tomorrow? ---- Yes, you can. ( No, I’m afraid not. )
I’ll not be able to come this afternoon.
• 当表示“经过努力才得以做成功某事”时应 用be able to,不能用Can。如:
He was able to go to the party yesterday evening in spite of the heavy rain.
can it be? It can’t be Tom because he has gone 来自百度文库o
Beijing.
1.(13北京) --__ you sing an English
song?
-- Yes, I can
A.Can B. May C. Must D. Need
2. (13福建) --Is that girl Susan? -- It ___ be her. She left for
3) 表示推测、可能性(不用 于疑问句)。
• might不是过去式,它所表示的可 能性比may小。 1.He may /might be very busy now. 2.Your mother may /might not know the truth.
2.(11安徽) –May I go out now,Dad? -No. You ___ let your mother know First. A.can B. may C. need D. must 3. (13年湖北) –Must I go there with You? --No, you ___. David ___ go there with you. A.mustn’t; can B. can’t; must C. don’t; should D. needn’t; may
1.(13江西) There’s only one day to Go. You ___ finish your work by Tomorrow. A.can B. will C. must D. may
2. (11江苏) Fifty dollars for a TShirt! You ___ be joking! A. must B. need C. may D. can
情态动词专项练习
By Steven
1. must
You must come in time. 1) 表示必须、必要。是说话人的主观看法 在回答引出的问句时,如果是否定的,
不能用mustn’t(禁止,不准),而用 needn’t, don’t have to(不必).
-- Must we hand in our exercise books today?
-- Yes, you must. -- No, you don’t have to / you needn’t.
1. must
– You’re Tom’s good friend, so you must know what he likes best.
2) 表示推测、可能性(只用于肯 定的陈述句)
Can I...?在口语中更常见。
2)用于祈使句,表示祝愿。
May you succeed!
1.(13河北) ___ I see your ID card, sir? We have to check your
information. A. May B. Must C. Should D.
Need
三、can, could
Can you lift this heavy box?(体力) Mary can speak three languages.(知识) Can you skate?(技能) 1) 表示能力(体力、知识、技能)。
• 此时可用be able to代替。Can只有一般现在 时和一般过去式;而be able to则有更多的时 态。