专题5.2 Unit 5 Discovering Useful Structures（备课件）-【上好课】2021-2022学年高一英语同步备课系列（人教版2019必修第三册）

Unit 5 The Value of Money Discovering Useful Structures 复习情态动词、过去将来时 Contents Part 1 Studying the rules Part 2 Practice 3 Read and pay attention to the words in bold. Step 1. Lead in 情态动词 4 Read and pay attention to the words in bold. Step 1. Lead in 过去将来时 Mu Lan determined that she was going to fight in place of her father. The boy said that he would challenge the difficult movement. 情态动词表示说话人对某一动作或状态的态度，本身不能单独作谓语，必须和不带to的不定式(即动词原形)连用。情态动词没有人称和数的变化。 一、情态动词 Step 2. Presentation 5 ①He can play golf now, but he couldn't last year. ②Walking with a stranger can be highly dangerous. ③- Can/Could I have a look at your new laptop? 我可以看看你的新笔记本电脑吗? 一Yes，you can./No，you can't. 可以。不可以。 ④That girl under the tree can't be Jenny- she's in the classroom now. ⑤Someone is knocking at the door. Who can it be? ⑥You can't be careful enough. 1.can和could (could是can的过去式，语气更委婉) 1　 能力 许可 可能 可能性 可能 再……也不为过 6 can表示推测 can表推测时一般用于否定句和疑问句中(could一般无此限制)。 表示对过去发生的行为怀疑或不肯定时, 常用 “can/could+have+过去分词”的否定或疑问形式。 It ca