（新人教版）2019-2020学年高中英语Unit3Computersgrammar课件必修2（英语）.ppt

3. Our computer just has been joined to the internet. 4. The child has been taken good care by Grandma Wang all these years. Our computer has just been joined to the internet. The child has been taken good care of by Grandma Wang all these years. 5. How long has the book been borrowed ? How long has the book been kept? 1. 使用现在完成时的被动语态要注意以下几点: 1) 现在完成时的被动语态的两个助动词，即have/has和been，两者缺一不可。 2) 只有及物动词才有被动语态，不及物动词（词组）没有被动语态, 如:happen, take place, die, appear, disappear, fail, remain, lie, last, sit , stand, break out, come true, belong to等． Conclusion: 3) 副词的位置 often, usually, always, never, hardly, seldom等副词置于have/has和been中间。如: [误] Such a man has been hardly believed. [正] Such a man has hardly been believed. 4 ) 许多不及物动词加介词或副词构成的短语 动词，相当于及物动词，也可以有被动语态。 但短语动词是一个不可分割的整体，变为被动 语态时，不可丢掉构成短语的介词或副词。如： e.g. A notice has been put up on the wall. 5) 非延续性动词，如borrow，finish，begin，start，buy，marry，open，join等构成的现在完成时的被动语态不能与表示一段时间的状语连用。若要表达相应的意思，则要改换动词或时态。 Ⅰ. 用括号内动词或词组的适当形式填空 1．More than 5,000 used bikes__________________ (collect) since the two brothers set up the organisation. 答案：have been collected 2．Since the cause of this disease________________ (discover)，now we need to develop the medicine to treat it. 答案：has been discovered Task4 Consolidation. 3．Over the past ten years，this town __________ (hit)twice by earthquakes. 答案：has been hit 4．—Will the lecture be held at 4 o’clock this afternoon? —No. It__________________(put off)till tomorrow afternoon. 答案：has been put off 5．Her novel is very popular among people of all ages；so far it____________(translate) into 25 languages. 答案：has been translated II. Choose the best answers. 1. All the preparations for the task ____, and we’re ready to start. A. completed B. complete C. had been completed D. have been done 2. ---- How long ____ at this job? ---- Since 1990. A. were you employed B. have you been employed C. had you