Unit 1 Our living planet Grammar and composition 课件-2025-2026学年高中英语译林版(2020)选修第一册

牛津译林版高中英语学程一课件 Unit 1 Our living planet Grammar and composition Page 6-7 Inversion 制作者：桂东一中 李宇平 ◆内容分析 本板块围绕单元话题，在有关“日长和年长变化”的语篇中，观 察、探究倒装的使用情况，自主归纳其核心规则；再通过单句、语篇 两个层面的巩固练习，内化新知；最后运用所学，准确、恰当、得体 地使用目标语法，完成具体情境中的写作任务，使语法知识的运用和 话题意义相结合，实现“形式一意义一使用”三者的统一。 教学目标 By the end of this section,we will be able to: 1.identify the use of inversion; 2.work out the rules of inversion; 3.use inversion to finish the tasks of rewriting sentences and completing an article; 4.write a journal entry using inversion. in-ver-sion /in'v3n/倒装，倒置，：颠倒倒转 A.Exploring the rules Below is an article from a science website about the changing lengths of days and years.Find the sentences that use inversion and fill in the box below.The first one has been done for you. 1)Seldom do we doubt that a day is 24 hours long and that a year consists of 365 days (well,a little more actually, which is why we have leap years). 2)Under the oceans lies the evidence for the changing lengths of days and years. Here is an example. 4)Based on all this evidence,not only do scientists conclude that the lengths of days and years have changed in past eras,they also predict that days will get longer in the future. Seldom do we doubt that a day is 24 hours long and that a year consists of 365 days (well,a little more actually,which is why we have leap years).These timings are based on the Earth's planetary motions.It takes the Earth a day to spin once on its axis and a year to make one complete circular movement around the Sun.However,would it surprise you to learn that scientists have found evidence that this has not always been the case? tim-ing/tarmI0/定时时间的选择（事情发生或计划安排的特定时间 cir-cu-lar/'s3:kjala(r)/环行的：绕圈的 the case(that.实情：事实 Under the oceans lies the evidence for the changing lengths of days and years.Ancient corals,just like tree trunks,show distinct growth patterns.With these patterns, it is possible for scientists to calculate the number of days in a year,many millions of years ago.Here is an example. By studying corals that were over 400 million years old, scientists estimate that an Earth year was 420 days long back then. dis-tinct/d'st虹nkt/清晰的清楚的明白的明显的截然不 同的有区别的不同种类的 Similarly,tidal records laid down in ancient river mouths also reveal different lengths of days and years in the past. Examining the daily,monthly and seasonal cycles of these tidal records lets scientists know the number of days in previous years.They indicate,for instance,that 620 million years ago the day was possibly 3 hours shorter than it is today. mouth,入海口：河口 cycle/'sarkal/周期循环 in-di-cate/Indrkert/指示，：指出 Based on all this evidence,not only do scientists conclude that the lengths of days and years have changed in past eras,they also predict that days will get longer in the future.So,one day,the expression "24/7"may well have to be replaced with the revised one,"25/7"! Working out the rules .We sometimes change the usual subject-verb order in a statement to emphasize an idea,or to make the sentence structure more balanced. We can use the inverted order when a sentence begins with: an adverb like (here there or an adverbial phrase about a location; a word with a negative meaning like never,(seldom and hardly; 回a phrase like not only