《英语人教版八年级下册过去进行时态中when和while的选择.pptx》由会员分享,可在线阅读,更多相关《英语人教版八年级下册过去进行时态中when和while的选择.pptx(9页珍藏版)》请在taowenge.com淘文阁网|工程机械CAD图纸|机械工程制图|CAD装配图下载|SolidWorks_CaTia_CAD_UG_PROE_设计图分享下载上搜索。
1、 Past continuous tense 过去过去进行进行时时 whenORwhile阿左旗九中阿左旗九中 樊洁华樊洁华When VS While?Rules1231.when意为意为“在在时刻或时期时刻或时期”,它可兼指,它可兼指“时间点时间点”与与“时间段时间段”,所引导的从句的动词既,所引导的从句的动词既可以是可以是终止性动词终止性动词,也,也可是可是延延续性续性动词动词。如:如:When I got home,he was having supper.我到家时,他正在吃饭。我到家时,他正在吃饭。When I was young,I liked dancing.我年轻时喜欢跳舞。我年
2、轻时喜欢跳舞。终止性动词:不能终止性动词:不能延续的动作,这种动作延续的动作,这种动作发生后立即结束发生后立即结束。如:如:openopen,close,finish,begin,come,go,close,finish,begin,come,go,arrive,reach,get to,leave,move,borrow,arrive,reach,get to,leave,move,borrow,buy,diebuy,die等。等。延续性延续性动词:能够动词:能够延续的动作,这种动作延续的动作,这种动作可以延续下去或产生持久影响可以延续下去或产生持久影响。如如:stay,live,learn
3、,study,work,wait,stay,live,learn,study,work,wait,watch,sing,readwatch,sing,read等。等。2.while只只指指“时间段时间段”,不不指指“时间点时间点”,从句的动词只限从句的动词只限于延续性于延续性动词。如:动词。如:While I was sleeping,a thief broke in.在我睡觉时在我睡觉时,盗贼闯了进来。盗贼闯了进来。While Miss Chen was having a class,the earthquake happened.陈老师上课的时候,地震发生了。陈老师上课的时候,地震发生了。
4、3.while引导的时间状语引导的时间状语从句多用进行时态从句多用进行时态,而而when引导的时间状语引导的时间状语从句多用一般时态从句多用一般时态。连词引引导表示表示所用所用谓语动词从句从句时态when时间状状语从句从句时间点点时间段段终止性止性动词延延续性性动词 多用多用一般一般过去去时while时间状状语从句从句时间段段延延续性性动词 多用多用过去去进行行时summaryWhen or While?1.We were talking_ the teacher came into the classroom.2.I was singing _ he was dancing.3._ I was cutting hair,the UFO landed.4.The boys were playing by the river _ Tom fell into the river.5.My mother was washing _ my father was cooking.6.What were you doing _ the UFO arrived?whenwhilewhilewhenwhilewhen