unit3 课件全

含义：表示过去某个时刻正在进行的动作。结构：be(was/were)+doing例句：Whatwereyoudoingatninelastnight?Iwastakingashoweratninelastnight过去进行时过去进行时含义：表示过去某个时刻正在进行的动作。结构：was/were+doing例句：IwashavinganEnglishclassatthistimeyesterday.现在进行时含义：表示现在正在进行的动作。结构：is/am/are+doing例句：IamhavinganEnglishclass.合作探究（二）：Pleasethinkaboutthesequestions:1.过去进行时的定义：表示在过去某一时刻或某一时间段正在进行的动作．2.句型结构：was/were+动词-ing3.时间状语：1)一般情况下有上下文的提示(2)由when和while引导的时间状语(3)具体到过去某个时间点如，atthistimeyesterday,at9o’clockyesterday,----3.Igotothe__________(理发店)tohaveahaircutonceamonth.4.Whentheteachercamein,_________________(所有的学生正在读书).5._______________(那个女孩在写信)whenIwentout.barbershopallthestudentswerereadingbooks.Thatgirlwaswritingaletter总结•1.when可指时间点，又可指时间段，从句中可用延续性动词，也可用非延续性动词。•2.while总是指一个时间段，从句中必须用延续性动词。比较“when”and“while”1.when“当…..时候”后面跟的动作不延续,常跟一般过去时WhentheUFOtookoff,theboywastakingphotos1.while“当…..时候”后面跟的动作延续,常跟过去进行时Whiletheboywastakingphotos,theUFOtookoff,TargetLanguage:比较“when”and“while”2.WhentheUFOlanded,theboywaswalkingdownthestreet.Whiletheboywaswalkingdownthestreet,theUFOlanded1.Whenthealiengotout,thegirlwasshopping.Whilethegirlwasshopping,thealiengotout.TargetLanguage:==getout出去；离开getoutof从…出来getoutoftheshower洗完澡出来talkonthephone通过电话交谈ExercisesChoose“when”or“while”tofillintheblanks.•1．_____Tomwaseatingsupper,itbegantorainoutside.•2．Don’tuseyourcellphone_____youaredrivingacar.•3．Whatwereyoudoing_____Mr.Zhoucomein?•4．Jimisgoodatmath_____MaryisgoodatEnglish.•5．WewerewatchingTV_____theelectricitywasoff.WhileWhileWhileWhenWhen短语•9.Ataroundteno’clockinthemorning.•在上午，在早晨inthemorning•在下午intheafternoon•在晚上intheevening•在十点钟左右ataroundteno’clock•在正午atnoon•在晚上atnight•*请注意介词的不同知识点•10.takeoff•（1）脱下eg.Pleasetakeoffyourcoat.It’swarmintheroom.•请脱下大衣，屋子里面很暖和。•（2）起飞eg.ThegirlwaseatingtheicecreamwhentheUFOtookoff.•当UFO起飞的时候，那个女孩正在吃冰激淋。•11.talkonthephone通过电话谈话•注意：这里要用介词on•12.getoutoftheshower洗完澡出来•getoutoftheUFO从UFO中出来•getout出来•13.IwaswalkingdownthestreetwhenaUFOlandedrightinfrontofme.•当一个UFO恰好落在我面前的时候，我正在街上走。•right在这里是副词，“恰好”“正好”的意思，表示强调。•例如rightnow（现在）•righthere（就在这儿）•rightinfrontofme恰好在我前面•14.besurprised（某人）很吃惊•eg.HewassurprisedwhenIsawhim.•我看见他的时候，他很吃惊。•另外，surprisesb.指“让某人吃惊”•eg.Idon’twanttosurpriseyou.•我不想让你吃惊。•15.Beforethepolicearrived,thealienlefttheshop.•在警方到达之前，外星人离开了商店。•before“在……之前”引导时间状语从句•16.bescared（某人）给吓坏了，害怕了•eg.Hewasscaredwhenheheardthestrangevoice.•当他听到了那个奇怪的声音，他害怕了。•17.runaway逃跑•18.walkaroundthestation在车站走来走去•19.Shedidn’tthinkaboutlookingoutsidethestation.•她没想到过要往车站外面看一看。•thinkabout考虑•lookingoutsidethestation是动名词短语，做thinkabout的宾语。•lookoutside往外看•WhileHaiYanwasatthedoctor’s,Iwasgoingtoclass.•当海燕在诊所的时候，我正要去上课。•atthedoctor’s在诊所（医院）•atthebarber’s在理发店知识点总结3.ThiswasoneofthemostimportanteventsinmodernAmericanhistory.oneof＋名词复数形式“---之一”．4.Althoughsomepeoplemaynot---whentheyheardabouttheevent.Although虽然，但是不能与but连用.hearabout=hearof听说，得知．(hearfrom---收到-----来信).5.HisflightaroundtheEarthlastedabout22hours.