Unit 3 The Internet Discovering Useful Structures课件-2022-2023学年高中英语人教版（2019）必修第二册

Unit 3 The Internet Discovering Useful Structures 现在完成时 have/has + v-ed 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。 Do you know the structures and meanings of the present perfect tense and passive voice? The Present Perfect Tense ①Unfinished events that started in the past continue to the present. e.g. I have lived in Changsha for five years. (I still live in Changsha now.) e.g. I have lived in Changsha since 2015. Review The students have cleaned the classroom. The classroom has been cleaned. You needn’t clean it now. 现在完成时 active passive 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。 现在完成时的被动语态 主动语态变被动语态的原则 “三变” 例:They are building nine parks. 原句主语 by的宾语 宾语 主语 谓语由主动 被动 “三不变” 原句意思不变 原句时态不变 原句主谓宾以外成分不变 Nine parks _ by them. are being built 时间状语 just; already; ever; never; yet; so far; by now 不明确的时间 一段时间 for 3 days; since 3 days ago 包括说话时间的 时间 this morning, this week, this month, this year 现在完成时的被动语态 【语法感知】 观察下列课文原句 1. Much has been written about the wonders of the World Wide Web. 2. People ’s lives have been changed by online communities and social networks. 3. Many people have been helped by the club. 4. Jan ’s life has been greatly improved by the Internet. 现在完成时与现在完成时被动语态的动词形式 找出下面句子的谓语结构,哪些是主动?哪些是被动? Jan’s life has been greatly improved by the Internet. The Internet has greatly improved Jan’s life. People have written much about the wonders of the World Wide Web. Much has been written about the wonders of the World Wide Web. 被动 主动 主动 被动 现在完成时谓语结构 主动 被动 have/has done have/has been done ......已经被...... 8 例2:Have they been sent abroad to study Eng-lish? 他们已经被派往国外学英语了吗? 例3:Who has been invented? 谁受到了邀请? 陈述句 主语+has/ have been(not)+P.P.+... 例1:Her motorbike has been stolen. 她的摩托车盗了。 一般疑问句 Has/have+主语+been+P.P.+...? 特殊疑问句 特殊疑问词+have/has +been +P.P.+...? 一、现在完成时被动语态的构成 9 二、现在完成时的的结构: 肯定式: S+have/has+V-过去分词(done) 否定式: S+have/has+not+V-过去分词... 一般疑问句: Have/Has+S+V-过去分词... 特殊疑问句: 疑问词+have/has+S+V-过去分词... 人教版2019版 高一 unit3 The Internet grammar【优秀课件】 三、现在完成时被动语态的用法 1. 现在完