人教版英语必修一Unit 1语法专题：情态动词教学精品课件
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情态动词的用法
2
情态动词的基本用法特点
1）.没有人称和数的变化 2.不能直接跟宾语，必须搭配实义动词 或be动词的原形除 ought 和 have 外 3.情态动词的过去式往往不表示时态
高中阶段都学过哪些情态动词呢 1 can / could / be able to 2 may/might 3 must / have to 4 shall / should 5 will / would 6 need / dare 7 ought to
4 shall 与 should
1用于一，三人称疑问句表示征求对方的意见 和 向对方请示 Shall the driver wait ?What shall we do next ?
2 用于 二 三人称陈述句表示命令警告，允诺， 威胁以及法律条文规定 You shall go with me / He shall be punished You shall have the book when I finish it All the children shall go to school at the age of seven.
人教版英语必修一Unit 1语法专题：情态动词教学精品课 件
2 may / might
1 May I watch Tv after supper? Yes you may /No ,you mustn't.（请求许可) 2 It may be true ./ she may come tomorrow / He might have some fever（推测） 3 May you succeed ! May you have many more days as happy as this one（祝愿）
----Could I use your dictionary?我可以用一下你的字典吗？ -----Yes, go ahead.可以，用吧（或Yes, you can.但不能说Yes,
you could.) Can/Could you tell me the way to the zoo?你能告诉我怎么去动
You mustn't smoke when you walk in the woods. You could start a fire.那样可能会引起火灾。 could/ can have done 表示对过去事情的推测
She can't have gone to school. It's Sunday.
人教版英语必修一Unit 1语法专题：情态动词教学精品课 件
人教版英语必修一Unit 1语法专题：情态动词教学精品课 件
5 will 与 would 的用法
1 表示意志和意愿 I will never do it again. They said that they would help us.
2 表请求，建议 Will you please take a message for me? Would you please pass him the book?
reading. tips: 在口语中 经常会用 have got to替代 have to I've got to work on Sunday. 3.must 与have to 的区别
人教版英语必修一Unit 1语法专题：情态动词教学精品课 件
人教版英语必修一Unit 1语法专题：情态动词教学精品课 件
3 表功能 This machine won't work. 4 表示习惯性动作与Hale Waihona Puke Baidused to有何区别 Fish will die without water. Every evening ,he would sit by the window.
人教版英语必修一Unit 1语法专题：情态动词教学精品课 件
may/ might as well 还是 -----好 we may as well stay where we are
人教版英语必修一Unit 1语法专题：情态动词教学精品课 件
人教版英语必修一Unit 1语法专题：情态动词教学精品课 件
must 和 have to
• 1. must 表示有做某一动作的必要或义务，强调主观 看法，可译为“必须，应该”
can 与could 1.表示能力：会 在表示过去的能力时用could I can swim. 我会游泳
I could not read such a easy book when I was 7 years old. 我七岁时连如此简单的书都看不懂
2.表示允许，许可。常用在口语中 此时could不表示时态，而是表 示比can语气上客气些
物园吗？
3.表示推测，用于肯定句（can罕见），否定句或疑问句。
但更常见于疑问句与否定句，在此种用法中，can 与 could没有时态的区别，只有可能性大小的区别。can表 示推测的可能性比could大。
Can he be ill at home?(他会是生病在家吗？) He cannot be at home.(他不可能在家)
Everyone must obey the rule. We must do everything step by step. 2. have to因客观使主语不得不做某事 You can't turn left here. You have to turn right. My eyesight is very poor, so I have to wear glasses for
人教版英语必修一Unit 1语法专题：情态动词教学精品课 件
7 ought to 的 用法
1 表应该与 should 的 区别 You ought to take care of him. You are his father .You ought to get him to receive good education 2 表推测 He ought to be home by now. He must be home by now.
2
情态动词的基本用法特点
1）.没有人称和数的变化 2.不能直接跟宾语，必须搭配实义动词 或be动词的原形除 ought 和 have 外 3.情态动词的过去式往往不表示时态
高中阶段都学过哪些情态动词呢 1 can / could / be able to 2 may/might 3 must / have to 4 shall / should 5 will / would 6 need / dare 7 ought to
4 shall 与 should
1用于一，三人称疑问句表示征求对方的意见 和 向对方请示 Shall the driver wait ?What shall we do next ?
2 用于 二 三人称陈述句表示命令警告，允诺， 威胁以及法律条文规定 You shall go with me / He shall be punished You shall have the book when I finish it All the children shall go to school at the age of seven.
人教版英语必修一Unit 1语法专题：情态动词教学精品课 件
2 may / might
1 May I watch Tv after supper? Yes you may /No ,you mustn't.（请求许可) 2 It may be true ./ she may come tomorrow / He might have some fever（推测） 3 May you succeed ! May you have many more days as happy as this one（祝愿）
----Could I use your dictionary?我可以用一下你的字典吗？ -----Yes, go ahead.可以，用吧（或Yes, you can.但不能说Yes,
you could.) Can/Could you tell me the way to the zoo?你能告诉我怎么去动
You mustn't smoke when you walk in the woods. You could start a fire.那样可能会引起火灾。 could/ can have done 表示对过去事情的推测
She can't have gone to school. It's Sunday.
人教版英语必修一Unit 1语法专题：情态动词教学精品课 件
人教版英语必修一Unit 1语法专题：情态动词教学精品课 件
5 will 与 would 的用法
1 表示意志和意愿 I will never do it again. They said that they would help us.
2 表请求，建议 Will you please take a message for me? Would you please pass him the book?
reading. tips: 在口语中 经常会用 have got to替代 have to I've got to work on Sunday. 3.must 与have to 的区别
人教版英语必修一Unit 1语法专题：情态动词教学精品课 件
人教版英语必修一Unit 1语法专题：情态动词教学精品课 件
3 表功能 This machine won't work. 4 表示习惯性动作与Hale Waihona Puke Baidused to有何区别 Fish will die without water. Every evening ,he would sit by the window.
人教版英语必修一Unit 1语法专题：情态动词教学精品课 件
may/ might as well 还是 -----好 we may as well stay where we are
人教版英语必修一Unit 1语法专题：情态动词教学精品课 件
人教版英语必修一Unit 1语法专题：情态动词教学精品课 件
must 和 have to
• 1. must 表示有做某一动作的必要或义务，强调主观 看法，可译为“必须，应该”
can 与could 1.表示能力：会 在表示过去的能力时用could I can swim. 我会游泳
I could not read such a easy book when I was 7 years old. 我七岁时连如此简单的书都看不懂
2.表示允许，许可。常用在口语中 此时could不表示时态，而是表 示比can语气上客气些
物园吗？
3.表示推测，用于肯定句（can罕见），否定句或疑问句。
但更常见于疑问句与否定句，在此种用法中，can 与 could没有时态的区别，只有可能性大小的区别。can表 示推测的可能性比could大。
Can he be ill at home?(他会是生病在家吗？) He cannot be at home.(他不可能在家)
Everyone must obey the rule. We must do everything step by step. 2. have to因客观使主语不得不做某事 You can't turn left here. You have to turn right. My eyesight is very poor, so I have to wear glasses for
人教版英语必修一Unit 1语法专题：情态动词教学精品课 件
7 ought to 的 用法
1 表应该与 should 的 区别 You ought to take care of him. You are his father .You ought to get him to receive good education 2 表推测 He ought to be home by now. He must be home by now.