Unit 4 Breaking boundaries Using language: It as an empty subject 第2课时学历案-2023-2024学年高中英语外研版（2019）选择性必修第二册

枣庄三中实验高中校区高二年级上学期英语学历案 编写教师：枣庄市实验高中英语统筹组长周敏 使用日期：2023.11 选必二 　Unit 4 Breaking boundaries（第2课时） Using language: It as an empty subject 自主学习【学】 【课标要求】 1. 本单元的主题语境是“人与社会”，涉及的主题语境内容是打破边界。 2. 语法部分的主要内容是it作形式主语的用法。 3. 本版块帮助学生深度聚焦语言的意义和功能，在真实的语境下进行思考和运用。 【学习目标】 1. 理解it作形式主语的用法，并在真实语境中运用。 2. 关注语用功能，学会从不同角度表达和阐明个人观点并提供例证。 【自学评价】 · 重点词组 1. 2. release films _____________　　　  3. in particular _____________　　　  4. be seen as ____________ 5. in the right direction _____________ 6. settle down _____________ 师生研学【研】 【学习过程】 Step1 Language perception Look at the sentences and answer the questions. Sentences (a) and (c) are from the reading passage. (P54) a But it is vital not to take any chances. b But not to take any chances is vital. c It is important to remember that Ebola doesn’t respect national boundaries. d To remember that Ebola doesn’t respect national boundaries is important.1. Were the students in sentence (a) persuaded before the detox started, or afterwards? Q1. What does “it” refer to in sentences (a) and (c)? Q2. What is the difference between the sentences in each group? Q3. Why does the author choose to use sentences (a) and (c) instead of (b) and (d)? Step2 Thinking Look for more sentences with the past perfect passive in the reading passage, and summarise its use in your own words. Step3 Learning it常代替由不定式、动词-ing形式或从句表示的真正主语而在句子中作形式主语，而将真正的主语移至句子的后面. 1，代替不定式短语作形式主语 常用于以下句型中： (1)It+be+adj.+for sb.to do sth. 此句型中的形容词描述的是事物的特征、特点。常用于此句型的形容词有important，easy，difficult，hard，necessary，unnecessary，possible等 ① It is very important for us to learn how to deal with stress. 学会如何应对压力对我们来说很重要。 ② As far as I’m concerned，it’s necessary to have a good command of English. 就我个人看来，掌握英语是必要的。 (2)It+be++adj.+of sb.to do sth 此句型中的形容词描述的是人的品德、特征。常用于此句型的形容词有kind，nice，wise，silly，polite，impolite，friendly，foolish，clever等。 ①How silly it was of you to give up such a good chance!放弃这么好的一次机会，你真傻！。 ②It was really very kind of you to give me a lift home.你让我搭便车回家