Unit 5 Discovering Useful Structures 学案和练习-2022-2023学年高中英语人教版（2019）必修第三册

Unit 5 Discovering Useful Structures 学案 【本课目标】 1.通过对课文的阅读,在课文的具体情境中理解和掌握情态动词和过去将来时的基本用法。 2.通过本学案的归纳,巩固内化情态动词和过去将来时的基本用法,并学以致用。 【自主学习】 in case　以防;以防万一 (课本P54)In case it happens to you on a trip abroad, what should you do? 万一在国外旅行时你遇到这种事,你该怎么办? in case of… 　　　假使……/万一…… in this/that case 如果这样/那样的话,在这种/那种情况下 in any case 无论如何,总之 in no case 决不(置于句首,谓语部分倒装) [温馨提示] 当case作先行词且在定语从句中作状语时,要用where引导定语从句。 【练一练】 (1)In case I forget, please remind me about it. 万一我忘记,请提醒我一下。(用作连词,表示条件,其意为“如果,万一”) (2)I'll take my raincoat in case it rains. 我将带上雨衣,以防下雨。(用作连词,表示目的,其意为“以防,免得”) (3)The sun is shining, but I'll take an umbrella just in case. 现在阳光闪耀,但我还是会带一把雨伞以防万一。(用作副词,其意为“以防万一”) (4)The wall was built along the river 　　　　　　　　floods.   该墙沿河而建,以防洪水。 (5)一句多译 ①The plane may be several hours late, and in that case there's no point in our waiting. →The plane may be several hours late, 　　　　　　　　　　　　there's no point in our waiting.(用定语从句改写)   飞机可能晚点几个小时,那样我们再等下去也就没有意义了。 ②We should in no case do anything that goes against the interests of people. →　　　　　　　　　　　　　　　　 that goes against the interests of people.(用倒装句改写)   我们决不应该做任何违背人民利益的事。 (6)Have you ever had the case 　　　　　　you are wronged although you did a good deed?   你是否有过做了好事而被冤枉的情形呢? 【本课语法学习】 一、情态动词 【探究概况】 阅读、观察下列句子,体会情态动词的用法。 ①I'm fond of my sister but she can be really stubborn. ②“You must have a wrong number,” she said.“There's no one of that name here.” ③Doctors say that exercise is important for health,but it must be regular exercise. ④I'm afraid Mr Harding can't see you now.He's busy. ⑤—May I take this book out of the reading room? —No,you mustn't.You read it here. ⑥—I haven't got the reference book yet,but I'll have a test on the subject next month. —Don't worry. You shall have it by Friday. ⑦It can't be the postman at the door. It's only six o'clock. ⑧Some young people these days just won't go out of their homes to contact the real world. ⑨—I don't really like James. Why do you invite him? —Don't worry. He might not come. He said