Unit 6 Space and beyond Section Ⅱ Using language—Grammar & Integrated skills课件(共68张PPT+ 学案）

英语 选择性必修 第四册[WY] Section Ⅱ　Using language—Grammar & Integrated skills Grammar 情态动词(复习) ①You must be hungry after all that walking. ②He can't know the secret. ③He was a contemporary of Freud and may have known him. ④I don't want to take away from his achievements, but he couldn't have done it without my help. ⑤The content of the course depends on what the students would like to study. ⑥Could I sleep on it and let you know tomorrow (1)①～④句表示推测，其中③④句表示对_____所发生事情的推测。 (2)⑤句表示说话人的意愿，意为“_____”。⑥句表示礼貌地请求别人做事，意为“_____”。 答案：(1)过去　(2)愿意　能否 (一)could, should, would的用法 1．could的用法 (1)表示过去一般的能力(即在过去有做某事的能力)。 Could you speak English then 那时你会说英语吗？ 若表示过去的特定能力(即在过去特定场合做某事的能力)，常不用could，而应用was (were) able to do sth或用managed to do sth或用succeeded in doing sth等。 The fire was very big but everyone was able to escape from the building. 火势很凶猛，但大家都从大楼里逃了出来。 (2)could表示推测，既可用于肯定句，也可用于否定句。表示某事有可能发生或可能是事实。在肯定句中没有must那么有把握；在否定句中没有can't那么有把握。 He could have gone home. 他可能已经回家了。 He couldn't be a bad man. 他不太可能是坏人。 (3)表示委婉客气地提出问题或陈述看法。 Could you drive me to the station 你可以开车送我去车站吗？ We could take the train or alternatively go by car. 我们可以坐火车去，也可以坐汽车去。 (4)表示惊异、怀疑、不相信等态度。 How could he say such a thing! 他竟然说出这种话来！ (5)could have done表示“可能已经……”，指对过去已经发生的事情的推测。此外，它还可以表示“本能够做某事(而没有做)”，暗含惋惜之情。 You could have done better if you had been more careful. 要是再细心一点，你原本可以做得更好。 2．should的用法 (1)表示义务、建议、劝告，意为“应该”，用于各种人称。其同义词是ought to。 Every citizen should obey the law. 每个公民都应当遵守法律。 You shouldn't waste any time. 你不应该浪费任何时间。 (2)表示推测：用于肯定句，表示按常规、常理的推测，意为“按理说应该”。 The film should be very good as it is starring first class actors. 这部电影是一流演员主演的，按理说应该拍得很好。 If all goes according to plan we should be in Shanghai tomorrow. 如果一切按照计划进行，明天我们就在上海了。 (3)表示说话人对某事不能理解，感到意外、惊异等，意为“竟然会”。 It is a pity that he should miss such a golden opportunity. 他竟然错过如此大好机会，真可惜。 (4)用于某些从句中表示虚拟语气，而should常可省略。 She suggested that they (should) book the ticket in advance. 她建议他们应该提前订票。 (5)should have done sth表示“本应该做某事(而事实上并没有做)”。 shouldn't have done sth表示“本不该做某事(而事实上做了)”。 I should have known he could not keep anything secret. I really shouldn't have told him that. 我本该知道他不会保守任何秘密。我真不该告诉他那件事。 3．would的用法 (1)表示请求、建议等，would比will委婉客气。在疑问句中用于第二人称。 Would you please lend me your pencil 请问我可以借下你的铅笔吗？ (2)表示意愿，在陈述语气和虚拟语 ... ...