Unit 4 Public transport Period 1 Welcome to the UnitAims:1. to get the students to talk about different means of transport and its main function.2. Students are expected to discuss the advantages and disadvantages between all these means of transport and how important they are to our lives.【要点探究】1、accelerate【 课 文 原 句 】 These new ways of digging accelerated the pace of the London Underground’s development.【点拨】accelerate 在此句中为及物动词,意为"加速,促进"。又如:Reforms and development in health and sports have been accelerated in recent years.The driver accelerated his car to catch up with me.【拓展】accelerate 的反义词是 decelerate,意为"降低速度,减速"。例如:The car decelerated as there was a police car before it.accelerate 的名词形式是 acceleration,表示"加速,加快；加速度"。例如:We have seen an acceleration in the rate of economic growth in recent years.2、permit【课文原句】 Visit our ticket office and buy one of the travel cards that permit you to travel all over the underground system.【点拨】permit 在此句中作及物动词,意为"允许,准许,许可"。后面可跟名词、代词和不定式等的复合结构。又如:We don’t permit children to swim in the pool.No one is permitted to smoke here.【拓展】(1) permit 还可以用作不及物动词,表示"允许；使有可能",多用于状语中。Weather permitting; we’ll go camping this weekend.I will go there this September if my health permits. (2) permit 的 过 去 式 、 过 去 分 词 和 现 在 分 词 分 别 是 permitted, permitted 和permitting。名词形式为 permission,意为"允许,准许"。(3) permit 还可用作名词,表示"许可证,执照,通行证"。例如:You can’t stay here without a work permit.3、undertake【 课 文 原 句 】 When I first undertook the project, I found the information confusing because I didn’t know how to organize it.【点拨】undertake ...
