Unit 3 Fascinating parks Discovering Useful Structures 语法课件-2023-2024学年高中英语人教版（2019）选择性必修第一册

Fascinating Parks 动词-ing形式作主语 Have you ever seen these signs? the –ing form 2 UNIT 3语法精讲 Entrepreneurial activities differ substantially depending on the type of organization and creativity. Entrepreneurial activities differ substantially depending on the type of organization and creativity. 动词-ing形式作主语 3 Focus on 基本用法 the –ing form used as subject -ing形式作主语 动词-ing形式作主语 1. 动词-ing形式作主语，相当于一个名词, 多指抽象、概念性的动作，经常性或习惯性行为，主语为单个 v-ing 时谓语动词用_______数。 e.g. 1) _________ (see) is believing. 2) _________ (read) aloud is very important for us to learn English. 3) _________ (play) badminton is my favourite sport. Seeing Reading Playing 单 5 Translating the following sentences. 1. 沉迷手机是浪费时间的。 Being addicted to smartphones is a waste of time. 2. 争论此类事情无益。 Arguing about such things is no good. 3.参加这个活动是值得的。 Taking part in this activity is worthwhile. 1. Being addicted to smartphones is a waste of time. 2. Arguing about such things is no good. 3. Taking part in this activity is worthwhile. It’s a waste of time being addicted to smartphones. It’s no good arguing about such things. It’s worthwhile taking part in this activity. ⑴ It's worth making the effort. ⑵ It is pleasant working with you. ⑶ It's no use crying over split milk. ⑷ It was a waste of time reading that book. 这件事值得努力去做。 和你一起工作很愉快。 覆水难收。 看那本书是浪费时间。 2. 有时为了句子平衡，避免头重脚轻, 用it作形式主语，而把真正的主语(动词-ing短语)后置。但这种句子形式有一定的限制，作表语的只能是某些形容词或少数名词。 形容词 名词 2. 有时为了句子平衡，避免头重脚轻, 用 it作形式主语，而把真正的主语(动词-ing 短语)后置。常见的固定句型有： It is/was a waste of time doing … 做……是浪费时间的 It is/was no good doing … 做……是没益的 It is/was no use doing … 做……是无用处的 It is/was worth doing … 做……是值得的 There is no sense in doing … 做……没有道理 常见的固定句型有： 9 3.在there be 结构中作主语： 这种结构的意思相当于 “It is impossible to do… ”。 There be no 动词ing There is no hiding of evil but not to do it. 例： 若要人不知, 除非己莫为。 There is no joking about such a matter. 这种事开不得玩笑。 4.动词-ing形式与不定式做主语的比较 动词-ing形式通常表示抽象动作；且表示已知的事情或经验。 动词不定式作主语则表示某次具体动作或行为；且表示未完成的事情或未达成的目的。 例1：Doing nothing is