Unit 2 Improving yourself Using language 课件-2022-2023学年高中英语外研版（2019）选择性必修第二册

Unit 2　 Improving yourself --- Using language 1. Students could learn some words and phrases. 2. Students could undestand the usage of “Past perfect passive”. 3. Students could write some a passage by using “Past perfect passive”. Learning Aims: What is your understanding of this passage？ Share you ideas with others 过去完成时被动语态 Past perfect passive Before reading, please try to write some sentences by using this grammar. Brainstorming:When learning this grammar, what come to your mind? 1Past perfect Try to write your opinions in your notebook! Answer the questions. a At the start of the detox, over 100 students had been persuaded to stop using social media, in ANY form, for seven days. b At the start of the detox, people had persuaded over 100 students to stop using social media, in ANY form, for seven days. Were the students in sentence (a) persuaded before the detox started, or afterwards? before the detox started. Answer the questions. a At the start of the detox, over 100 students had been persuaded to stop using social media, in ANY form, for seven days. b At the start of the detox, people had persuaded over 100 students to stop using social media, in ANY form, for seven days. What is the difference between sentences (a) and (b)? The passive voice is used in sentence (a), while the active voice is used in sentence (b). Answer the questions. a At the start of the detox, over 100 students had been persuaded to stop using social media, in ANY form, for seven days. b At the start of the detox, people had persuaded over 100 students to stop using social media, in ANY form, for seven days. Why does the author choose to use a passive form instead of an active form? The author doesn’t know who had persuaded students to stop using social media. What conclusions can you draw from the facts? two hours a day on social media: a total of 730 hours each year. • On average, Chinese Internet users each spend two hours a day on social media: a total of 730 hours