Unit 2 Period 3 Grammar 情态动词(II) 导学案-2023-2024学年高一英语外研版（2019）必修第二册

Book2 Unit2 Let’s celebrate! Period 3 Grammar 情态动词(II) 学习目标： 1. 掌握情态动词的用法； 2. 情态动词在语境中的运用 ( 清北班) 学习重点： 掌握情态动词的用法 易混易错知识：在语境中准确使用情态动词 情境感悟: 判断下列句子中画线部分情态动词的用法 1．That is why Letters from Father Christmas could be the perfect book for those who regard Christmas as a special time of year.________________ 2．The letters were also beautifully illustrated—each must have taken its true author, Tolkien, a long time to complete. ________________ 3． In another letter, Father Christmas complained about how he could not stop his helpers playing games with the toys instead of wrapping them up.________________ 4．Interestingly, the letters did not contain the usual warnings to children that they might not receive their presents if they were not good.________________ 5．Letters from Father Christmas tells us that as well as enjoying the adventures of Father Christmas, Polar Bear and other characters at the North Pole, we can all share the true spirit of giving at Christmas time.____________ 6．By expressing love for his children in such a special way, Tolkien may indeed have been the real Father Christmas.________________ 语法精讲: 一、情态动词can与could的用法 1．表示能力：can用来表示现在的能力，could表示过去的能力。 I can play basketball now, but I couldn't when I was young. 现在我会打篮球了，但小时候我不会。 2．表示请求和许可：could语气比can委婉，但回答时只能用can。 —Can/Could you lend me a hand? —Yes, I can. 你能帮我一下吗？ 是的，我能帮你。 3．表示推测，意为“可能”。多用于否定句或疑问句。 —Can he be in the reading room now? —No, he can't be in it. Because I saw him in the office just now. ——他现在可能在阅览室吗？ ——不，他不可能在(阅览室)。因为我刚刚在办公室看见他了。 4．表示理论上或习惯上的可能性，意为“可能会”。 Jim can be very annoying.吉姆可能会很烦人。 [易错精点]　can和be able to表示“能力”时的区别： can 用于指现在，常表示自身具有的能力 be able to 用于各种时态，表示经过努力后所具有的能力 Babies can swim when they were born. 婴儿们刚生下来时会游泳。(自身具有的能力) Without his hard work, he was not able to get good grades. 如果没有他的努力工作，他是不可能取得好成绩的。(经过努力) 课堂练习1.选出下列句中can/could的含义 A．表示能力 B．表示推测 C．表示请求和许可 D．表示理论或习惯上的可能性 (1)I believe that he can't be so rude.(　　) (2)I can speak English fluently while he can't.(　　)