Section Ⅲ Discovering Useful Structures现在完成时的被动语态1．(教材 P28)Much_has_been_written(write) about the wonders of the World Wide Web．2．(教材 P28)But the Internet has_done(do) much more for people than simply make life more convenient．3．(教材 P28)Many people have_been_helped(help) by the club．4．(教材 P28)She no longer feels lonely, and her company_has_become(become) quite successful．5 ． ( 教 材P32)Today I thought I’d blog about a question that has_been_asked(ask) many times—how do you stay safe online and avoid bad experiences on the Internet?一、现在完成时的被动语态的结构肯定式主语＋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．．．？◆He has been selected to take part in the sports meeting．他已被挑选出来参加运动会。◆The ink has not been removed from his overcoat．墨迹还没有从他外套上去掉。◆Has the date for the next meeting been decided?下次会议的日期已确定了吗？◆How long has the battery not been changed?电池多久没有更换了？【即时演练 1】——句型转换The children have already been told the good news．① 将上面的句子变为否定句。The_children_haven’t_been_told_the_good_news_yet．② 将上面的句子变为一般疑问句。Have_the_children_been_told_the_good_news_yet?③ 对上面句子中的 The children 进行提问。Who_has_been_told_the_good_new s _yet?二、现在完成时的被动语态的用法1．现在完成时的被动语态同它的主动语态一样，强调过去的动作对现在造成的影响或结果，通常与 already, yet, just, never, recently 等副词连用。◆The machine has already been repaired．1机器已经修好了。2．表示一个被动的动作或状态开始于过去，持续到现在，并可能持续下去，常与 for 或since 引导的时间状语连用，或用于“How long ．．．？”句型中。◆Financial problems of the company have been discussed for nearly two hours．公司的财务问题已被讨论了...
