被动语态(英语公开课)
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现在完成时的被动语态(学导练公开课)现在完成时的被动语态现在完成时是英语中常用的一种时态,用来表达过去某个时刻开始的动作或状态一直延续到现在,或者产生的结果对现在造成的影响。
被动语态则是用来强调动作的接受者或被动者。
本文将探讨现在完成时的被动语态的用法和构成。
一、现在完成时的被动语态的构成方式现在完成时的被动语态由“助动词have/has+been+过去分词”构成。
其中,have/has表示动词have/have的形式,been是助动词be的过去分词形式,过去分词则表示被动动作的主语,根据实际情况加上-ed或其他形式。
二、现在完成时的被动语态的用法1. 强调行为的接受者或被动者:被动语态可以使句子的主语变为动作的接受者或被动者,从而突出动作的承受者的重要性。
例如:- Active voice (主动语态): The workers have built a new bridge.- Passive voice (被动语态): A new bridge has been built (by the workers).2. 强调动作的结果:现在完成时的被动语态可以强调动作或状态的结果对现在造成的影响。
例如:- Active voice (主动语态): The company has launched a new product.- Passive voice (被动语态): A new product has been launched (by the company).3. 强调动作的连续性:现在完成时的被动语态可以强调动作或状态从过去某个时刻开始一直延续到现在。
例如:- Active voice (主动语态): They have been renovating the old house for two weeks.- Passive voice (被动语态): The old house has been renovated (by them) for two weeks.三、现在完成时的被动语态的例句1. 完整的句子:- The book has been read by many students.- The new movie has been watched by millions of people.- The homework has been completed by the students.2. 否定句:- The car hasn't been repaired yet.- The problem hasn't been solved by the team.- The report hasn't been submitted on time.3. 疑问句:- Has the document been signed by the manager?- Have the tickets been booked for the concert?- Has the message been received by him?4. 现在完成时的被动语态与其他时态的结合:- The room had been cleaned before the guests arrived.- The email will have been sent by the end of the day.五、现在完成时的被动语态注意事项1. 动词的过去分词形式要根据实际情况来决定,有些动词的过去分词形式和原形相同,如read、cut等,有些动词的过去分词形式则需要根据词义和规则来确定,如do-did-done、see-saw-seen等。