课件38张PPT。Unit 1 Festivals around the world语法专题内容索引写作专题Period Three Grammar & Writing语法专题Ⅰ.用适当的情态动词完成课文原句 1.Most ancient festivals celebrate the end of cold weather，planting in spring and harvest in autumn. 2.Some festivals are held to honour the dead or to satisfy the ancestors，who return either to help or to do harm. 3.For the Japanese festival Obon，people go to clean graves and light incense in memory of their ancestors.情态动词 (Ⅰ)wouldmightshould4.Harvest and Thanksgiving festivals be very happy events. 5.At the Spring Festival in China，people eat dumplings，fish and meat and give children lucky money in red paper.canmayⅡ.用适当的情态动词填空 1.He have the book when I finish reading. 2.Even an experienced teacher make mistakes. 3.I haven’t decided where I’m going for my holidays.I go to Australia. 4.You be hungry already—you had lunch only two hours ago! 5.When we lived in that village，we often play together in the river there.shall/cancanmay/mightcan’twould6.“You have a wrong number，” she said.“There’s no one of that name here.” 7.Drivers drive after drinking. 8.She promised to come by 12：00.She be here at any time.mustmustn’t should1.can与could的用法 (1)表示能力(could是过去时)。 My grandmother can do some shopping on the Internet，but she couldn’t last year. 我奶奶会网购了，但是去年她还不会。 (2)表示猜测意为“可能”，一般用于疑问句和否定句(could是过去时)。 Can this news be true？这则消息是真的吗？(3)表示请求和许可(could表示更委婉的语气，回答时只能用can)。 —Can/Could I go now? —Yes，you can. ———我现在可以走了吗？ ———是的，可以。 (4)用于肯定的陈述句中，表示理论上或习惯上的可能性。 As we all know，anyone can make mistakes. 我们都知道，任何人都可能犯错。(5)习惯用法“cannot...too...”表示“无论怎样……都不过分，越……越好”。有时cannot可用can never替代。 We cannot thank you too much for what you’ve done for us.对于你们为我们所做的一切，我们怎么感激你们都不过分。can与be able to (1)can只有现在时和过去时(could)，而be able to则有更多的时态变化，在将来时、完成时和非谓语动词中只能用be able to。 (2)can一般指自身具有的能力，而be able to则表示经过一段时间的努力后所具有的能力，相当于manage to do或succeed in doing。 (3)在否定结构中was/were able to与could没有区别。 This time I failed in the exam，but I’ll be able to pass the exam next time. 这次我考试不及格，但下次考试我能及格。(经过努力) She ran fast but she couldn’t/wasn’t able to catch the bus. 她跑得很快可还是没能赶上公共汽车。考点警示2.may与might的用法 (1)表示允许、许可。might在语气上比may更委婉。以may/might开头的问句在否定回答中要用mustn’t/can’t。 —May/Might I watch the program Keep Running after supper? —Yes，you may./No，you mustn’t/can’t. ———晚饭后我可以看节目《奔跑吧》吗？ ———是的，可以。/不，不行。(2)表示把握不大的推测，意为“可能”，用于肯定句。 might语气更加不肯定，指现在或将来，只有在宾语从句中might do (be)才表示过去的可能性。 I think he may come tomorrow. 我认为明天他可能会来。 (3)may用于祈使句表示祝愿。 May you ... ...
