(课件网) Section Ⅲ Discovering Useful Structures 1 重难语法·要攻克 目 录 2 知识要点·须拾遗 3 课时检测·提能力 重难语法·要攻克 掌握核心语法 1 现在完成时的被动语态 1. Much has been written about the wonders of the World Wide Web. 2. But the Internet has done much more for people than simply make life more convenient. 3. Many people have been helped by the club. 4. She no longer feels lonely， and her company has become quite successful. 【我的发现】 上面句子中，句1、3中使用了 ，其结构 为： ；句2、4中使用了 。 现在完成时的被动语态 have/has＋been＋done 现在完成时 现在完成时的被动语态表示到现在为止某事已经被完成或被做。该语 法项目既要表示现在已经完成又要表示被动的含义，因此很多学生在 具体运用中容易顾此失彼。 一、现在完成时的被动语态的常用句式 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 ...？ So far， effective measures have been taken to protect endangered creatures from dying out. 迄今为止，已经采取了有效措施来保护濒危动物免遭灭绝。 The construction of the bridge has not been finished. 这座桥的建设还没有完成。 Has the date for the next meeting been decided？ 下次会议的日期已经确定了吗？ How long has the project been carried out？ 这项工程已经实施多长时间了？ 【即时演练1】 用现在完成时的被动语态改写下列句子。 ①Jack’s boss has always praised him for his devotion to work. →Jack by his boss for his devotion to work. ②They have found a good place to build a temple in the village. →A good place by them to build a temple in the village. ③We haven’t yet decided how to solve that difficult technological problem. →How to solve that difficult technological problem by us yet. has always been praised has been found hasn’t been decided 二、现在完成时的被动语态的用法 1. 表示被动的动作在说话之前已经完成，强调过去的动作对现在造成 的影响或产生的结果，通常与already、 yet、 never、 recently等副 词及时间状语so far、 by now、 up till/to now、 since等连用。 With more and more children taking part in this activity， many family problems have already been solved. 随着越来越多的孩子参加这项活动，许多家庭问题已经得到了 解决。 2. 表示一个被动的动作或状态从过去开始一直持续到现在，并可能继 续持续下去，常与for或since等引出的时间状语（从句）连用，或 用于how long引出的句子中。 We have been taught to be honest since we were very young. 自从我们很小的时候就被教育要诚实。 3. 用在条件、时间状语从句中，表示从句动作先于主句动作完成。 You shouldn’t go out before your homework has been finished. 在你的作业完成之前你不应该出去。 【即时演练2】 单句语法填空 ①I’m also good at writing in English and two articles of mine （publish） on 21st Century so far. ②Some efforts （make） to improve the air quality in the city last winter. ③Over the past three years， the paintings （take） to more than 20 museums in the world. ④For centuries， the ancient language （pass） down from one generat ... ...
