八年级英语上册 Unit 8 Natural disasters Grammar课件 （新版）牛津版.ppt

unit8naturaldisasters tom play football is ing lucy is read abook ing whatistomdoing whatislucydoing presentcontinuoustensebe am is are verb ing 现在进行时 tom play football was ing lucy was read abook ing whatwastomdoingatthatmoment whatwaslucydoingat2 30p m yesterday they watching tvfrom6to8 were thetwins think were ing whatweretheydoingfrom6to8lastnight whatwerethetwinsdoingatthistimeyesterday whatweretheydoing theyweredoingmorningexercises at9 05yesterdaymorning theywereplayingbasketball atthistimelastsunday shewasdrinkingmilk atthistimeyesterday atthattime shewasplayingcomputergames from10to11yesterdaymorning hewasreadingnewspaper theyweredoingmorningexercisesat9 05yesterdaymorning theywereplayingbasketballatthistimelastsunday hewasdrinkingmilkatthistimeyesterday canyouworkouttherule shewasreadingnewspaperfrom10to11yesterdaymorning iwasplayingcomputergamesatthattime pastcontinuoustensebe was were verb ing 过去进行时 过去进行时主要表示在过去某一时刻正在进行的动作 e g a theywereeatingbreakfastat7 00amyesterday b iwaswritingaletteratthistimeyesterday c fiveminutesago dannywaslookingoutofthewindowandsuzywasreadingabook 2 在过去某段时间一直在进行的动作e g a from1983to1998 hewasteachingatyale b theywerebuildingadamlastwinter makesentences 1 at9o clocklastsunday2 atthistimeyesterday3 from7a m to6p m lastmonday4 atthattime5 from9to10lastnight watchtvreadbookspractiseswimmingwatchtheparademakecakes 过去进行时的句式1 基本结构 was were ving2 肯定句 主语 was were ving3 否定句 was werenot vingwasnot wasn twerenot weren t 4 疑问句 将was were移到主语前5 特殊疑问句 疑问词 was were 主语 ving wasshetalkingatthattime no shewasnottalkingatthattime no theywerenotteachingenglish weretheyteachingenglish weusethepastcontinuoustensetotalkaboutthingsthatwerehappeningataparticulartimeinthepast pastcontinuoustense过去进行时 过去进行时表示在过去某一时刻或某一段时间内正在进行或发生的动作 形式为was were v ing 常与表示过去的时间状语连用 如 lastnight lastsaturday等 或者与when while as引导的过去时间状语连用 asnowstormhitsunshinetown asnowstormhitsunshinetown mr wuisaskingthestudentsaboutit completetheirconversationwiththecorrectformsoftheverbsinbrackets mr wu whataterriblesnowstorm itstartedataboutseventhismorning i read thenewspaperthen what you do simon simon i have breakfast mr wu whataboutyou millie wasreading weredoing washaving millie i walk tothebusstop sandy isawyouandyourparentsstandingonthesideoftheroad you wait forataxi sandy yes mydad scarbrokedownbecauseofthecoldweather he ring someonetocomeandhelpwhenyousawme waswalking were waiting wasringing whatwastherabbitdoingjustnow whatwasthepigdoingjustnow hewasjumpingjustnow hewasdancingjustnow therabbitwasjumpingwhilethepigwasdancing lookatthepicturesandanswerthequestions thewormwaseatingwhilethedogwasreading twolongactionswentonatthesametime wewereclappingourhandswhiletheteacherswerewalkingacrossthepark therabbitwasjumpingwhilethepigwasdancing thewormwaseatingwhilethedogwasreading whilethepigwasdancing therabbitwasjumping whilethedogwasreading thewormwaseating while whenandas都表示 当 的时候 e g iwassleepingwhentheearthquakestarted peoplewererunninginalldirectionswhilepiecesofglassandbrickswerefallingdown asiwastryingtofindmywayout isuddenlyheardsomenoiseaboveme usingwhile whenandas 1 当连接同时发生的两个延续性长动作时 常用while引导 e g whileiwaswatchingtv hewaslisteningtomusic milliewasreadingabookwhileeddiewassleeping 2 如果短暂性的动作是主句时 我们可以用when while或as引导 e g when while asmilliewaswatchingtv andycameintotheroom 3 如果延续性的动作是主句时 我们经常用when来连接 e g milliewaswatchingtvwhenandycameintotheroom 4 如果两个短暂性的动作同时发生 我们通常用as连接 e g asmilliesatdownonthesofa andycameintotheroom 注 当一个短暂性动作发生的同时伴随着一个延续性的动作 这时我们通常用过去进行时来表示延续性的动作 用一般过去时来表示短暂性的动作 playinginthesnow someclass1 grade8studentswenttoplayinthesnow completethesentenceswiththecorrectformsoftheverbsinblanks usewhen whileandastoconnectthesentences simon arrive amy get somesnowfromtheground 2 suzyandkitty build asnowman millie take photos 3 daniel fall over he make abigsnowball when arrived fell while as when wasmaking when while as werebuilding wastaking wasgetting 4 peter hide behindatree asnowball hit him 5 millieandherclassmates play inthesnow andy run towardsthem wereplaying when while as ran washiding when hit 1 i myhomeworkwhenmike lastnight 昨天晚上迈克来的时候我正在写作业 2 whileann tv herfather home 安正在看电视时 她父亲回来了 wasdoing came waswatching returned exercises 4 she theroomwheni toseeher 我去看她的时候她不是在打扫房间 5 i myvocationinengland at thistimelastsummer 去年夏天的这个时候我正在英国度假 wasn tcleaning went wasspending 3 whatwereyoudoingwheni atthedoor 我敲门的时候你在干什么 knocked 6 mary whilepeter thepiano mary在跳舞