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课件网) Unit 3 The Internet Period 3 Discovering Useful Structures New words battery Wi-Fi New words button file They’ve built a kind of new PC with more functions. New words New words Have you confirmed the Wi-Fi password confirm sb in sth New words Have you pressed the button yet to copy the file pressure n. 表示 发生的或 的动作对 造成的 。 现在完成时概念： 过去 已完成 现在 影响或结果 e.g. 1. Goodbye to you my trusted friend. 别了朋友，我的挚友。 2. I have just finished the homework. 作业现在已经做完了。 常用的时间状语有： ◆常与不确定的时间状语连用，如: up to now, by now, lately, already, since, ever since, just, yet, before, recently, so far, in the past/last few years等,表示“到目前为止”所发生的动作. 现在完成时谓语动词的构成 have/has+ done 1.have &has 当主语是 ___，用has; 当主语是 _____，用have。 第三人称单数 其他人称 2.done在现在完成时中叫_____ 除不规则变化外，一般情况加ed 过去分词 现在完成时的基本句型 现在完成时 ( Active Voice ) 肯定式 have/has done 否定式 have/has not done 一般疑问句 have/has + 主 + done？ （have/has提前） 特殊疑问句 疑问词+have/has + 主 + done？ (疑问词+一般疑问句) 1.Read the pairs of sentences. Underline and compare the different verb forms. 现在完成时被动语态的构成: Jan’s life has been greatly improved by the Internet. The Internet has greatly improved Jan’s life. Much has been written about the wonders of the World Wide Web. People have written much about the wonders of the World Wide Web. Verb form Active Passive have/has + been + done 主语和动作之间是主动关系 主语和动作之间是被动关系 have/has + done 2.Change the sentences into the present perfect passive voice. 1.They’ve built a kind of new PC with more functions. A kind of new PC has been built with more functions. …已经被建造 现在完成时 主动： 被动： 1) 动作或状态从过去开始,一直持续到现在, 常与下列时间状语连用: so far, up to now, up till now, by now, recently, lately, in recent years; (ever) since+一般过去时, in / during / over the past / last... years/months/days/weeks, over the years 1.His first novel has received good reviews since it came out last month. 2) 动作或状态发生在过去,但对现在有影响或结果 2.I got caught in the rain and my suit has been damaged. have/has done have/has been done 现在完成时 主动： 被动： 3) 固定句型:It / This / That is the first (second, third…) time that… +现在完成时，表示“第几次做某事” 3.This is the first time we have seen a film in the cinema together as a family. have/has done have/has been done 练习 1.Every means _____(try) to protect pandas over the past 10 years. 2.Many kinds of apps _____(create) to attract young people to play games so far. 3.Many words _____(add) to the language since it was published. has been tried have been created have been added 练习 4.Many scientific centres _____(establish) throughout China in recent years. 5.Up to now, researchers _____(find) at least five species on the island. have been established have found 练习 1.By the time Jack r ... ...
