人教版高一英语必修三Unit 1 Festivals around the world Grammar课件(42张）

课件42张PPT。Unit 1Unit 1 Festivals around the world情态动词To learn and practise the usage of modal verbs.Modal verbs such as may, might, will, would, can, could, shall, should, and must are used for many purposes. Find the sentences in the reading passage that use modal verbs. 1 Most ancient festivals would celebrate the end of cold weather, … 2 Sometimes celebrations would be held after hunters had caught animals.3 At that time people would starve if food was difficult to find… 4 …or to satisfy the ancestor, who might return either to help or to do harm. 5 For the Japanese festival Obon, people should go to clean graves… 6 …this will lead the ancestor back to earth.7 It is now a children’s festival, when they can dress up and go… 8 …the children might play a trick on them. 9 Festivals can also be held to honor famous people. 10 Harvest and Thanksgiving festivals can be very happy events.11 In European countries, people will usually decorate … and will get together… 12 Some people might win awards for their… 13 At the Spring Festival in China, people… may give children lucky money in red paper. 14 These carnivals might include parades, dancing in the streets…【观察】 1.?① Where can Betty be? ② Anna may know Tom’s address. ③ If you’re not careful, you could get into trouble. ④ I guess Mr. Smith might be late for work.情态动词⑤ —It must be our headmaster. —No, it can’t be him. He has gone to?Beijing. It may be Mr. Zhang. ⑥ The rescue team should arrive by 5 o’clock this afternoon.【归纳】 can, could, may, might, must, can’t, should都可表示 _____。 ①can, may表示“可能”（①、②）。 注意：在疑问句和否定句中表示“可能”时，多用 _____。may表“可能”，可用于一般时、进行时、完成时或完成进行时。如： She may be waiting for you in the entrance hall.可能性can②could, might表示推测时，并非表示过去，而表示可能性较弱（③、④）。 ③must表示推测时，意为“肯定，一定”，表示否定时多用 _____（⑤）。 ④should用来表示一种估计的情况，“按理应当……，估计……”（⑥）。can’t2.?① Lucy can speak five languages. ② He said that he could do anything we wished. ③ I haven’t been able to read that report yet.【归纳】 can表能力，指某人具有某种知识和技能而能够做到某事，指现在或将来的情况（①）； could表示过去具有某种能力（②）。 注意：当表示经过艰苦努力而成功地做到或设法做到某事时要用 _____，而不用 _____（③）。be able tocan3.?① Can / May I help you? ② May I come in? ③ Could I have a drink of water? ④ Will / Would you please send me Jack’s address? ⑤ Nobody shall throw away rubbish anywhere on the campus!【归纳】 can表示许可或请求，可与 ____ 互换使用（①）； may和might表“_____”时比can和could更正式（②）， might和could则比may和can更婉转、更有礼貌（③）；will/would表示征求意见或提出请求，would此时并不表示过去，而表示委婉语气（④）； shall可以用于第二、第三人称，表示按照条约、规章等必须履行的义务（⑤）。may许可4.?① Ask, if you will, who the owner is. ② John will fall asleep in church. ③ I would often ask such questions when I was at school ... ...