Unit 6 How long have you been collecting shells？（第6课时）一、现在完成进行时 1.定义：现在完成进行时表示从过去开始一直持续到现在的动作,而且还要继续下去。 2.现在完成进行时的构成： 肯定句：主语 + have / has been + doing . 否定句：主语+have/has + not + been + doing 一般疑问句：Have/Has + 主语 + been + doing? 3.现在完成进行时的用法： 现在完成进行时的句子中多用延续性动词,如live, learn, study, work等， 常与for two hours, since 1998,all this morning, these few days等表示一段时间的状语 连用。强调“谈论一直做某事” 如: I have been cleaning the room all this morning. 我今天一上午都在打扫房间。 Ive been studying English since I was 4 years old. 自从4岁起我就一直学英语。 4.现在完成进行时与现在完成时的区别：(1)现在完成时强调动作的完成，而现在完成进行时侧重的是动作的持续进行。如：I have read a book about birds. （已经读完） I have been reading a book about birds.（一直都在读,现在还在读,有可能会继续读下去） (2) 两种时态都有延续性， 但现在完成时往往只说明一个事实，一种影响或结果，无 感情色彩；现在完成进行时表示一个动作的延续、重复，有时有一定的感情色彩。如： She has been singing all the day. 她都唱了一整天了。（抱怨、厌烦）Have you been talking with him on the phone_?你六点起就一 直在给他讲电话？2.for表示时间的持续，后跟_。表示一段时间，多与带数词的名词连用，谓需用延续性动 词。I havent been seeing a film for a long time. 我好长时间没看电影了。总结：1）现在完成进行时态由助动词have/has+_+_构成，一般与for+_, since+_连用。2）现在完成时是have/has+_。现在完成进行时强调动作一直持续到现在，并将继续下去；现在完成时强调动作的结果，即动作已经结束。课堂练习用since或for填空：1.The Wang family have been living in the neighborhood _October last year.2.Sarah has been sleeping _ 9:00.3.Mike has been studying English _ he was six years old.4.Ive been watching you _ two minutes.5.Ive been practicing the piano _ 10:30. 6.Hes been living here _ 10 years.拓展练习一1. How long have you been_(write) in English. 2.我住在北京12年了。I have been living in Beijing _ _ _ .3.他已经在这儿呆了2个小时了。 He _ _ staying here _ two hours.eleven years old. 4.He has been studying English _(自从他10 岁以来)。5.The runner has been _(run)for 2 hours.6.The boy has been living here since his family_(move)here.7.I have been collecting stamps _I was 10.8.这本书你买了多少时间了？_ _ have you _ this book?二. 单项选择：( )1. The man _ for two hours , but he isnt tired at all . A. ran B. is running C. will run D. has been running( )2. _ you _ in this school since you came to Dali ? A. Did ,study B. Do, study C. Will ,study D.Have ,been studying( )3. The boy _ his homework after he got back from school . A. did B.was doing C. has been doing D. would do( )4. -_have you been skating ? -For two hours .A. How long B. How far C. How often D. How many