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人教版高中英语必修二unit3 section2 Learning about Language课件_图文

成才之路 ·英语 人教版 ·必修2 Unit 3 Computers Unit 3 Section Ⅱ Learning about Language 现在完成时的被动语态 1 课前新知预习 3 课堂达标验收 2 课堂要点探究 4 课 时 作 业 课前新知预习 ? ? ? ? 根据句意,用所给词的正确时态及语态填空。 ①Over time I ______________________(change)quite a lot. 经过一段时间我已被改变了很多。 ②First as a PC and then as a laptop, I ________________ (use)in offices and homes since the 1970s. 自20世纪70年代以来,我一直被用在办公室和家庭里,先是作为个 人电脑,后来又做成便携式的。 ? ? ③Since the 1970s many new applications ________________ (find) for me. 自20世纪70年代以来,我又被开发出了很多新的用途。 ④I ________ even ________(put) into space rockets and sent to explore the Moon and Mars. 我甚至被放置在航空火箭里去探测月球和火星。 答案:①have been changed found ④have;been put ②have been used ③have been ? ? ? ? 课堂要点探究 ? ? 一、基础点拨 1.现在完成时的被动语态的各种句式。 肯定式 否定式 一般疑问式 特殊疑问式 主语+have/has been done... 主语+have/has not been done... Have/Has+主语+been done...? 疑问词+have/has(+主语)+been done...? ? 一、基础点拨 ? ? 1.现在完成时的被动语态的各种句式。 ①The first subway to cross the Yangtze River has been started.(肯定式) 第一条横穿长江的地铁已经开工。 ②When and where to have our holiday hasn't been decided yet.(否定式) 我们还没决定何时去何地度假。 ? ? ? ? ③Has the construction of the underwater tunnel been finished? (一般疑问式) 水下隧道的建造已完工了吗? ④What parts of Gansu Province have been hit by strong winds and heavy snowfall in the past two days?(特殊疑问式) 在过去的两天里,甘肃省的什么地方受到大风和大雪侵袭? ? ? ? ? 名师点拨 ? (1)since then/since+从句,so far,by now,up to now, recently,lately,already,yet,in/during the past/last+段时间 等,常用于现在完成时的句子中。 (2)ever,never,already,yet等副词,用于现在完成时的被动语态 时,放在has或have之后。 ? ? 2.现在完成时的被动语态的用法。 ? (1)表示过去发生的动作对现在造成的影响与结果。当动词为短暂性动 词时,可与already或yet连用,但不能与for或since引导的表示一段时 间的状语连用。 The work has already been completed. 这项工作已完成。 ? ? ? (2)表示一个被动的动作或状态开始于过去,持续到现在,并有可能持 续下去,常与for或since引导的时间状语连用,或用于How long...? 句型中。 ①My car has been repaired for two days. 我的车已被修理了两天。 ②The house has been painted since the family moved out. 自从这一家人搬出,这座房子已被粉刷。 ? ? ? ? ? (3)用在时间或条件等状语从句中,表示将来某时已完成的动作,即用 现在完成时的被动语态代替将来完成时的被动语态。 ①A new plan will be made after this one has been finished. 这项计划完成后才能制订新计划。 ②If the shopping has been done,let's have a rest. 如果买完了东西,让我们休息一下吧。 ? ? ? ? ? 二、难点突破 ? ? ? 1.现在完成时的被动语态的助动词,即have/has和been缺一不可。 No news has been heard about him since he left his hometown. 自从他离开家乡,就没有关于他的任何消息传来。 ? 2.与一般过去时的被动语态的区别。一般过去时的被动语态所表示的 动作或状态与现在的情况没有联系,而现在完成时的被动语态则强调 与现在的情况有联系。 The construction of the market was finished(只说明过去)last year, and the new market has been put(对现在有影响)into use since then. ? ? 市场建设工作去年完工;自那时起新建市场已被投入使用。 ? 3.非延续性动词,如borrow,f

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