现在完成时的被动语态PPT课件

注意:Р1. 副词的位置? often, usually, always, never, hardly, seldom等副词置于have/has和been中间。Р2. 并不是所有动词都有被动语态? 1) happen, take place, break out, belong to, take part in , cost, last等不及物动词或词组无被动语态。如:? [误] Great changes have been taken ? place in China since 1978.? [正] Great changes have taken place in ? China since 1978.Р2) open, break, drop等不强调动作发出者时常用主动语态。如:? [误] The door has been opened of itself.? [正] The door has opened of itself.Р3. 短语动词不可分割或省略其中的介词? 或副词。如:? The SARS patients have been taken ? good care of.РMy brother has had(不能用has bought) this bike for almost four years.? How long has this book been bought?? How long ago was this book bought?РHow many Harry Porter books has J.K.Rowling written?РShe has written seven Harry Porter books .РSeven Harry Porter books have been written by J.K.Rowling.