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课件网) Unit 2 Unit 2 Let’s celebrate! Modals (2) To master the usage of modal verbs + base form of verbs and modal verbs + perfect form for speculation in different situations To enhance the ability to correctly apply modal verbs in various sentence patterns when making guesses through relevant exercises To understand and discuss the celebration activities of the Lantern Festival Look at the sentences from the reading passage and answer the questions. a That is why Letters from Father Christmas could be the perfect book ... b The children must have been very excited as they opened it. c ... they might not receive their presents if they were not good 1) What do the words in red indicate: an order, a request, ability or possibility The words in red indicate possibility. v. 表明, 显示 n. 请求, 要求 a That is why Letters from Father Christmas could be the perfect book ... b The children must have been very excited as they opened it. c ... they might not receive their presents if they were not good 可能性 2) Will the meaning of sentence (a) change if we replace “could” with “must” or “might” It means the speaker is quite sure about the statement. a That is why Letters from Father Christmas could be the perfect book ... b The children must have been very excited as they opened it. c ... they might not receive their presents if they were not good That is why Letters from Father Christmas must be the perfect book … The meaning of sentence (a) will remain more or less the same. That is why Letters from Father Christmas might be the perfect book … 在肯定句中，表可能性时 “could” 和 “might” 含义相近。 3) What happens if we change “must” and “might” in sentences (b) and (c) into “could” It means it’s impossible for the children to receive their presents. a That is why Letters from Father Christmas could be the perfect book ... b The children must have been very excited as they opened it. c ... they might not receive their presents if they were not good b. The children could have been very excited as they opened it. c. … they could not receive their presents if they were not good. It means the speaker is not sure about the statement, and it’s only a possibility. 情态动词表示推测 Look for more sentences with modals in the reading passage. In which sentences do the modal verbs indicate speculation(推测) 1) As parents, they try to keep that magic alive for their children for as long as they can. 2) Who could it be from 3) The letters were also beautifully illustrated — each must have taken its true author, Tolkien, a long time to complete. 4) In another letter, Father Christmas complained about how he could not stop his helpers playing games with the toys instead of wrapping them up. 5) By expressing love for his children in such a special way, Tolkien may indeed have been the real Father Christmas. 情态动词+ 动词原形 can+动词原形 1. 用于肯定句，表示客观可能性，意为 “可能”，即从理 ... ...
