Unit 3 Period Ⅲ　Discovering Useful Structures（课件）-【优化探究】2021-2022学年新教材高中英语必修第二册同步导学案（人教版）（河南专用）

Period Ⅲ　Discovering Useful Structures 返回导航 下页 上页 人教英语·必修第二册 核心语法 专项突破 课时作业 巩固提升 返回导航 下页 上页 人教英语·必修第二册 现在完成时的被动语态 [生活中的语法] 返回导航 下页 上页 人教英语·必修第二册 [学习中的语法] ①Over time I have been changed quite a lot. ②I have been used in offices and homes since the 1970s. ③Over time my memory has developed so much that, like an elephant, I never forget anything I have been told! ④Since the 1970s many new applications have been found for me. 返回导航 下页 上页 人教英语·必修第二册 ⑤I have also been put into robots and used to make mobile phones as well as help with medical operations. ⑥I have even been put into space rockets and sent to explore the Moon and Mars. ⑦Such a thing has never been heard of before. ⑧The room has already been cleaned. 返回导航 下页 上页 人教英语·必修第二册 [我的发现] (1)以上句中使用了现在完成时的被动语态；其谓语动词的构成为 。 (2)列举上面例句所用的时间状语： 。 have/has been done over time, since the 1970s, before, already 返回导航 下页 上页 人教英语·必修第二册 一、概念 现在完成时表示过去所发生的动作或事情对现在的影响或产生的结果，着眼点在现在。若动作与主语之间构成动宾关系，则用现在完成时的被动语态。 返回导航 下页 上页 人教英语·必修第二册 二、基本结构 肯定式 主语＋have/has been done... 否定式 主语＋have/has not been done... 一般疑问式 Have/Has＋主语＋been done...？ 特殊疑问式 疑问词＋have/has＋主语＋been done...？ 返回导航 下页 上页 人教英语·必修第二册 He has been selected to take part in the sports meeting. 他已被挑选出来参加运动会。 The construction of the bridge has not been finished. 桥的建设还没有完成。 Has the date for the next meeting been decided? 下次会议的日期已决定了吗？ How long has the battery not been changed? 电池多久没有更换了？ 返回导航 下页 上页 人教英语·必修第二册 [即学即练1] 按要求完成下面题目 Li Ping has already been told the good news. ①将上面的句子变为否定句。 Li Ping . hasn't been told the good news yet 返回导航 下页 上页 人教英语·必修第二册 ②将上面的句子变为一般疑问句。 Li Ping ? ③将上面的句子对Li Ping进行提问。 Has been told the good news yet Who has been told the good news yet? 返回导航 下页 上页 人教英语·必修第二册 三、用法 1．表示过去发生的动作对现在产生的影响和结果，且这个动作与句子的主语有逻辑上的动宾关系。 I have been told the sports meeting will be put off. 我已被告知运动会将要被推迟。(结果：现在我已经