Unit 3 The lnternet Discovering useful structures课件-2023-2024学年高中英语人教版（2019）必修第二册

Present perfect passive voice 现在完成时的被动语态 Unit 3 Lead in Appreciate a poem Look at the way your face has been washed Look at the way your teeth have been brushed Look at the way your shoes have been cleaned You’d better do them again. Look at the way the flowers have been planted Look at the way the grass has been cut Look at the way the paths have been swept I hope that you’ll come here again. Enjoy! 3 BY YUSHEN 现在完成时 active passive The students have cleaned the classroom. The classroom has been cleaned. You needn’t clean it now. present(now) future past 表示说话时已经完成的被动性的动作或结果，主语是动作的承受者。 You have slain an enemy. Your team has destroyed the turret. slay – slew - slain have/ has done have/ has been done An ally has been slain. An enemy has been slain. You have been slain. Your turret has been destroyed. 现在完成时 现在完成时的被动语态 防御塔 杀死 敌人 盟友 slay-slain-slain 一、The Present Perfect Tense 现在完成时 结构：has/have + done (V-过去分词) 助动词, 无意义 表示说话时已经完成的动作, 而且这个动作的结果对现在仍有影响; 表示动作发生在过去, 但一直持续到现在, 并且有可能继续持续下去。 6 表示 发生的或 的动作对 造成的 。 Past present 过去 已完成 现在 影响或结果 e.g. 1. I have just opened the door. 结果是 (The door is not closed now.） 现在完成时概念： 常用的时间状语有： ◆常与不确定的时间状语连用，如: these days, up to now, by now, lately, already, never, ever, just, yet, before, recently, so far, in the past few years等,表示“到目前为止”所发生的动作. 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) 肯定式 S + have/has +been + done The research has been done successfully. 否定式 S + have/ has + not + been + done... The author’s new story has not been published. 一般疑 问句 Have/ Has +S +been + done... Has his washing machine been repaired? 特殊疑问句 疑问词+have/ has +S + been+done... Who has been invited? 二、The present perfect passive voice 现在完成时的被动语态 现在完成时 1. 定义 表示说话时已经完成的被动性的动作或结果, 主语是动作的承受者。