2014届高三高考英语复习计划 情态动词.ppt

谢谢欣赏 学习计划： 学习计划论坛： I could have passed my examination easily but I made too many stupid mistakes. If we had taken the other road, we might have arrived earlier. You needn’t have watered the flowers, for it’s going to rain. I should have thought of that. They should not have left so soon. You ought not to have been so careless. * * * * * * * * * * * * * * * * * * * * * * * Model Verbs 情态动词 第一部分 情态动词的基本用法 情态动词表示可能、必要、允许、愿望、猜测等意义，它们本身虽有一定词义，但不能独立用作谓语、也没有人称和数的区别，其后必有动词原形，共同构成复合谓语。 can与could的用法 1)表能力 can表能力时意味着凭体力或脑力或技术等可以做。 I can climb this pole. He is only four , but he can read. Fire can’t destroy gold. zxxk 因为can不能和其他助动词连用，所以表示将来式时用will be able to You will be able to skate after practising it times. 2)表可能性 Can the news be true? It can’t be true. What can he possibly mean? 3)表示允许（和may意思相近）常见于口语。 Can (May) I come in ? 我能进来吗？ Can I smoke here ? 我可以在这里抽烟吗？ could表过去的能力、可能和许可,（间接引语） I could swim when I was only six. Father said I could swim in the river. 3.cannot/couldn’t … too + 副词/形容词; cannot/couldn’t …+副词/形容词 + enough 无论……也不过分； 越……越好 You can’t be too careful when crossing the street. I cannot thank you enough. 我对你感激不尽。 Can和 could 的一些固定搭配 1.Can’t/couldn’t help doing 忍不住; He can’t help laughing. 2.Can’t/couldn’t but + 动词原形 只好……； 不得不…… I couldn’t but admit that he was right and I Was wrong. 我不得不承认他对了，我错了。 情态动词may与 might 的用法 1)表示请求、可以、允许。 You may watch TV now. 2)当回答由may 引起的问题时，否定答语要用 must not,表示“不许可、不应该、不行”。 May I come in? ( = can )学科网 Yes, you may. No, you mustn’t. 3)表建议（可和as well 连用） You may as well stay where you are. Might 1)表过去的“可能”和“允许”多用于间接引语。 She said that he might take her dictionary. 除在间接引语中外，might一般不表示过去的“可能”与“许可”。表过去的“可能”可用could，表过去的“许可”可用were (was) allowed to。 2)表现在的“可能”，其可能性要比may小。 Electric irons could be dangerous; they might give you a severe shock. may 和mig