Unit 2 Topic 3 Section B课件2023-2024学年仁爱科普版九年级英语上册

Unit 2 Saving the Earth Topic 3 Section B 学习目标 预习检测 知识梳理 课堂总结 学习 导航 重点探究 当堂检测 新课导入 Let’s play a game. Say a sentence with and, or, but & while like this one by one. I like English and I’m good at it. I am good at English while my good friend is good at history. My good friend is good at history but … 能熟悉并正确运用本课时的重点单词和短语 1 2 能通过阅读文章，了解如何成为一名环保者 学习目标 1.You_______to obey the rules in the company. A.should B.must C.can D.ought 2.You had better_______when you are eating. A.not to speak B.to speak C.not speak D.not speaking 预习检测 D C 3._____a cloth bag when you go shopping. A.Take B.Taking C.To take D.Took 4.Instead of____at home, the girl went shopping. A.stay B.staying C.to stay D.stayed 5.When you leave, you must_____electricity. A.shut off B.shut up C.turn down D.turn up A B A 知识梳理 Key points 1. First, you ought to turn off the electricity when you leave a room. 首先，当你离开房间的时候，应该随手关灯。 ought to 情态动词, 表 “应该; 应当”; 语气比 should 强;指道义上应该做的事,有时含有责备或督促的语气。should 指主观上感到有责任或义务去做。 eg: You ought to help your mother do some housework. 你应该帮你妈妈做些家务。 We should study hard.我们应该努力学习。 Key points ※ought to 是情态动词，无人称和时态、数的变化，后接动词原形； eg: You ought to help your mother do some housework. 你应该帮你妈妈做些家务。 We should study hard.我们应该努力学习。 其否定式和疑问式： ① ought to 的否定式： ought not to + v. =oughtn’t to +v. ② ought to 的疑问句形式是将ought提前即可。 eg: You oughtn’t to get up so late in the morning.你早晨不应该起这么晚。 Ought I to tell her the bad news? 我该告诉她坏消息吗？ Yes, you ought./No, you oughtn’t. Key points 2. You’d better walk or ride a bike instead of taking a bus or a taxi. ※ instead of 是动词短语，意为“代替”， 其后接名词、动名词、代词。 ※ instead 是副词，意为“代替，替代”。常放在句末或句首，后不接其他词。 ※ take the place of意为“代替……,取代……,接替……的位置”，可作谓语。 Key points 3. It’s so easy to be a greener person. 成为一名环保者真容易。 ※ It is / was +adj. + to do sth. 句型中的it是形式主语，真正的主语是 to be a greener person。 类似的句型有 It is / was +adj. + of / for sb.to do sth. 。