when-when-与与whilewhileItwassevenyesterdayevening.Theteacherswereallhavingameeting.Therewasnoteacherintheclassroom.Theclassroomwasreallynoisy.Everyonewashavingfun.Whatwereyoudoingintheclassroom?Whatwereyourclassmatesdoing?While the teachers were having a meeting,I _.My classmate XXX _KathyFamilymembers8:00a.m10:00a.m3:00p.mWhat were Kathys family doing atlast Saturday ?While Kathy_, her_What was your mother doing when you woke up this morning?What were you doing when I came in just now ?What was your father doing when you got homelast night?when和和while都可表示都可表示“当当的时的时候候”，引导时间状语从句。你知道两者，引导时间状语从句。你知道两者在过去进行时中的用法有什么不同吗？在过去进行时中的用法有什么不同吗？1.以以when和和while引导的时间状语从句引导的时间状语从句1)延续性动词和非延续性动词延续性动词和非延续性动词延续性动词延续性动词指动作可以延续一段时间指动作可以延续一段时间,而不是而不是瞬间结束。瞬间结束。如如:work、study、drink、eat等。等。非延续性动词非延续性动词指动作极为短暂，瞬间结束。指动作极为短暂，瞬间结束。如如:start、begin、hit、jump、knock等。等。2.My mother was making breakfast when I woke upI was talking with Mike when my teacher came in.My father was watching TV when I got home主句的动作是主句的动作是持续性持续性的，而从句动作是的，而从句动作是短暂性短暂性的，的，此时用此时用_引导时间状语从句，主句用引导时间状语从句，主句用_时态，从句用一般过去时态。时态，从句用一般过去时态。when过去进行My mother was making breakfast when I woke upI was talking with Mike when my teacher came in.My father was watching TV when I got home.While my mother was making breakfast ,I woke up.While I was talking with Mike, my teacher came in.While my father was watching TV, I got home. 当主句主句的动作是的动作是短暂性短暂性的，的，从句从句的动作是的动作是持续性持续性的，的，此时用此时用_引导从句，主句用引导从句，主句用_时态，时态，从句用从句用_时态。时态。while一般过去一般过去过去进行过去进行While Kathy was making breakfast, her sonwas watching TV.While Kathy was helping her daughter with herhomework, her husband was looking throughNewspapers.While Kathy was talking on the phone, her motherwas shopping.当当主句主句和和从句从句的动作在过去的某时刻或某段时间的动作在过去的某时刻或某段时间同时发生同时发生,而且动作都是而且动作都是持续性持续性的，此时用的，此时用_引导从句，而且主句和从句都用引导从句，而且主句和从句都用_时态。时态。while过去进行时过去进行时1）当从句中的谓语动词为持续性动词， 可以用while也可以用when 引导时间状语从句时。2）当从句中的谓语动词为短暂性动词时，必须用when 引导时间状语从句。_ he was making dinner, he cut his finger.When/While He was making dinner _ he cut his finger.when3) 如果主句和从句谓语动词都是持续性动词，用while 引导时间状语从句。_ he was making dinner, his wife waswatching TV.While 总结总结1)when可指时间点可指时间点,又可指时间段又可指时间段,从句中从句中可用可用延续性动词延续性动词,也可用也可用非延续性动词。非延续性动词。2)while总是指一个时间段总是指一个时间段,从句中从句中必须用延必须用延续性动词续性动词。Lookatthetableandwritesentenceswithbothwhileandwhen.JohnMarytakephotosbuyadrinkplaythepianoleavethehousecleanhisroomturnontheradioshoptakethecartothecarwash4a1.WhileJohnwastakingphotos,Maryboughtadrink.JohnwastakingphotoswhenMaryboughtadrink.2.WhileJohnwasplayingthepiano,Maryleftthehouse.JohnwasplayingthepianowhenMaryleftthehouse.3.WhileJohnwascleaninghisroom,Maryturnedontheradio.JohnwascleaninghisroomwhenMaryturnedontheradio.4.WhileJohnwasshopping,Marytookthecartothecarwash.JohnwasshoppingwhenMarytookthecartothecarwash.JohnMarytakephotostalkonthephoneplaythepianosweepthefloorcleanhisroomcookdinnershopdochoresWhat will happen if your alarm clock doesnt go off?DavidWhathappenedtohimyesterday?Listening2aListenandnumberthepictures1-5.123451.MyalarmdidntgooffsoI_uplate.2.I_tothebusstopbutIstillmissedthebus.3.I_forthebuswhenitbegantorainheavily.4.I_sobusy_fortheumbrellathatIdidntseeacarcoming.5.I_ahotshowerand_somewarmfood.tookatewaslookingwaswaitingwokeran215341.Myalarmdidntgooff1.MyalarmdidntgooffsoI_uplate.soI_uplate.2.I_tothebusstop2.I_tothebusstopbutIstillmissedthebutIstillmissedthebusbus.3 3.I.I_forthebusforthebuswhenitbegantorainheavily.whenitbegantorainheavily.4.I_so4.I_sobusybusy_fortheumbrellathatIfortheumbrellathatIdidntseeacarcoming.didntseeacarcoming.5.I_ahotshowerand5.I_ahotshowerand_somewarmfood._somewarmfood.tooktookateatewaswaslookinglooking waswaitingwaswaitingwokewokeranranTVreporter:TVreporter: Telluswhatuswhathappenedyesterdayhappenedyesterdaymorning.morning.Boy:Boy:TVreporter:TVreporter:So,whentheSo,whentherainstormrainstormcame,whatcame,whatwereyoudoing?wereyoudoing?Boy:Boy:TVreporter:TVreporter:Boy:Boy:2cDavid had a _ day yesterday. his alarm clock didnt _ _so that he _ up late. He needed to be at school_ eight!So he ran to the bus stop, but he still _ thebus. When he got to school, it was _eightthirty. His teacher was _ with him and hefelt bad all day. Then it was time to go home.While he was_ for the bus, it suddenly started to rain _. While he was_for the umbrella in the schoolbag, a car came andit got water all over him. He was completely _, finally, the bus came and _ him home. He _a hot shower and _ some warm food. It felt so good to be home!terriblego off wokebymissedalreadyangrywaitingheavilylookingwetbroughttookate1.基本概念基本概念过去去进行行时表示在表示在过去某一去某一时刻或一段刻或一段时间内正在内正在进行的行的动作。作。这一特定的一特定的过去去时间除除有上下文暗示以外有上下文暗示以外,一般用一般用时间状状语从句来表从句来表示。示。2.结构构 was/were+动词-ing1.读了了这些句子些句子,你能你能总结出句子中包含的出句子中包含的语法法吗？肯定式：肯定式：I/He/She/Itwasworking.We/You/They/wereworking.否定式否定式:I/He/She/Itwasnotworking.We/You/They/werenotworking.3.句式句式(以以work为例例)疑疑问式和式和简略回答略回答:WasIworking?Yes,youwere./No,youwerent.Wereyouworking?Yes,Iwas./No,Iwasnt.Washe/she/itworking?Yes,he/she/itwas.No,he/she/itwasnot.Werewe/you/theyworking?Yes,you/we/theywere.No,you/we/theywerent.注：注：1)Wasnot常常缩略略为wasnt;werenot常常缩略略为werent。2)一般一般过去去时与与过去去进行行时用法的比用法的比较:一般一般过去去时表示在表示在过去某个去某个时间发生生过的的动作或存在作或存在的状的状态,而而过去去进行行时则表示在表示在过去某一去某一时刻或刻或某一段某一段时间正在正在进行的行的动作。作。例如例如:Davidwrotealettertohisfriendlastnight.大卫昨晚给他的朋友写了封信。大卫昨晚给他的朋友写了封信。(信写完了。信写完了。)Davidwaswritingalettertohisfriendlastnight.大卫昨晚一直在给他的朋友写信。大卫昨晚一直在给他的朋友写信。(信不一定写完。信不一定写完。)例如例如:Whatwereyoudoingateightlastnight?昨晚八点你在干什么？昨晚八点你在干什么？Iwastakingashower.我我(当时当时)在淋浴。在淋浴。Whatwashedoingwhentherainstormcame?暴风雨来的时候他在干什么？暴风雨来的时候他在干什么？Hewasreadinginthelibrarywhentherainstormcame.暴风雨来的时候他在图书馆看书。暴风雨来的时候他在图书馆看书。WhatwasJennydoingwhileLindawassleeping?琳达在睡觉的时候琳达在睡觉的时候,珍妮在做什么？珍妮在做什么？WhileLindawassleeping,JennywashelpingMarywithherhomework.琳达在睡觉的时候琳达在睡觉的时候,珍妮在帮助玛丽做作业。珍妮在帮助玛丽做作业。Iwaswalkingtoschool_Isawacatinatree._Sallyarrivedhome,hermotherwascleaningthehouse. 请仔细观察下面的例句，然后补全空格中的内容。请仔细观察下面的例句，然后补全空格中的内容。_Iwassleepinginthebedroom,someoneknockedatthedoor.Davidfell_hewasridinghisbike._Andywaswaitingforthebus,hewasreadinganewspaper.Hewascleaninghiscar_Iwascooking.whenWhenWhilewhileWhilewhile主句的动作是持续性的，而从句动作是短暂性的，此时用主句的动作是持续性的，而从句动作是短暂性的，此时用_引导时间状语从句，主句用引导时间状语从句，主句用_时态，从句用一般过去时态。时态，从句用一般过去时态。过去进行过去进行when主句的动作是短暂性的，从句的动作是持续性的，此时用主句的动作是短暂性的，从句的动作是持续性的，此时用_引导从句，引导从句，主句用主句用_时态，从句用过去进行时态。时态，从句用过去进行时态。一般过去一般过去时时while主句和从句的动作在过去的某时刻或某段时间同时发生主句和从句的动作在过去的某时刻或某段时间同时发生,而且动作都是持续性而且动作都是持续性的，此时用的，此时用_引导从句，而且主句和从句都用引导从句，而且主句和从句都用_时态。时态。while过去进行过去进行Fillintheblankswithwas,were,whenorwhile.At7:00a.m.,Iwokeup._I_makingmybreakfast,mybrother_listeningtotheradio._Iwaseating,theradionewstalkedaboutacaraccidentnearourhome.MybrotherandIwentoutrightawaytohavealook._wegottotheplaceoftheaccident,thecar_inbadshapefromhittingatree.Butluckilythedriver_fine.Theroads_icybecauseoftheheavysnowfromthenightbefore.WhilewaswasWhileWhenwaswaswere4b将下列汉语句子翻译成英语。将下列汉语句子翻译成英语。1.当我正在网上查找信息的时候，门铃响了当我正在网上查找信息的时候，门铃响了。WhileIwaslookingforinformationontheInternet,thedoorbellrang. 2.当我看见他的时候，他正在做一架模型飞机。当我看见他的时候，他正在做一架模型飞机。HewasmakingamodelplanewhenIsawhim.3.当我正在跑步的时候，我妈妈和我妹当我正在跑步的时候，我妈妈和我妹妹正在妹正在放风筝。放风筝。WhileIwasrunning,mymotherandmysisterwereflyingakite.