北师大高中英语nit20 lesson1 Futurology课件.ppt

2. In the next few years, computers will become handier. the first computer in the world 副词since 二．Since作为副词，表示从过去以来、以后或到现在的情形或状态，常与现在完成时态连用。例如： 1．He left home two weeks ago and we haven’t heard from him since. 他两周前离开了家，到现在我们一直没有他的消息。 2．He came to Zhenjiang 6 years ago and has lived here (ever) since.他6年前来到镇江，从此便住在这里。 Since 连词用法 三．since引导原因状语从句 作为连词，since可引导原因状语从句，表示因为；既然；鉴于：例如： 1． He didn’t come since he was busy.他因为忙，所以没有来。 2． Since this method doesn’t work, lets try another.既然这种方法不行，我们就试用另一种吧。 四．Since引导时间状语从句 1．若since引导的状语从句的谓语是终止性动词的过去时，则从句表示的时间是“从动作开始的那一时刻起”。例如： He has studied very hard since he came to our school.自从他来到我们学校，他学习就非常努力。 We have been missing them since they left here自从他们离开这里，我们就一直很想念他们。 2．若since引导的状语从句的谓语动词是持续性动词或表示状态动词的过去时时，则从句表示的时间是“从动作或状态结束时算起”。例如： I haven’t heard any noise since I slept. Sleep 为持续性动词，sleep的动作结束时，即“醒来”时，所以这句应译为“我醒后还未听到任何声音”。 present: noun 1. gift 2. the time that we are experiencing now At present: at this time, now 5. By the year 2025, no one will die of starvation and no one will live on welfare. The old man had to live on welfare because he was out of work. 靠社会救济生活 Many children in African die of starvation every year. Quiz Cloze. The future is mysterious. ______ the centuries, people have always ____________ the future. What will our life become? Futurologists never stop their step to _____ that. Here’re some of their predictions. In the next few years, we will use voice to give ___________ to computers___________ using the keyboard. Over wondered about predict instructions instead of ___ the year 2015, _______ material will have produced. You should not worry about your garments being_________ or dirty forever. Starvation and racial ___________ will have disappeared by the year 2025 and people can live for _______ 150 years in 2030. Living on other planets will not be a dream ___ the end of the century. Whether these predictions ___