Unit 3 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 Period 3 Discovering Useful Structures 本课件所用配图及视频非作者本人所有，仅用于教育目的。 1 Jan's life has been greatly improved by the Internet. Much has been written about the wonders of the World Wide Web. Let’s learn Read the pairs of sentences. Underline and compare the different verb forms. The Internet has greatly improved Jan’s life. People have written much about the wonders of the World Wide Web. 2 Verb form (动词形式) How do we from the present perfect passive voice? Fill the blank. Active(主动) have/has + v-ed Passive(被动) ____________________ have/has + been v-ed 现在完成时(主动语态) 结构：have/has + done 现在完成时的被动语态 结构：have/has + been done 3 现在完成时的被动语态 1.结构：have/has + been done 2.概念：强调一个发生在过去的被动性动作，它有两层意思： ①动作已经完成，强调对现在造成的结果或影响； ②主语与谓语动词之间为被动关系。 Jan's life has been greatly improved by the Internet. 现在完成时的被动语态 1.结构：have/has + been done 2.概念：强调一个发生在过去的被动性动作，它有两层意思： ①动作已经完成，强调对现在造成的结果或影响； ②主语与谓语动词之间为被动关系。 Jan's life has been greatly improved by the Internet. 4 Change the sentences in