八年级英语上册Unit8Natural disasters Period3 Grammar上课课件（共41张PPT）牛津译林版（含音频+视频）.pptxVIP

Unit8Naturaldisasters

Period3Grammar;;A.Pastcontinuoustense

Weusethepastcontinuoustensetotalkaboutthingsthatwerehappeningataparticulartimeinthepast.;Was;AsnowstormhitSunshineTown

AsnowstormhitSunshineTown.MrWuisaskingthestudentsaboutit.Completetheirconversationwiththecorrectformsoftheverbsinbrackets.;MrWu:Whataterriblesnowstorm!Itstartedataboutseventhismorning.I(1)____________(read)thenewspaperthen.What(2)__________you(do),Simon?

Simon:I(3)______________(have)breakfast.

MrWu:Whataboutyou,Millie?

Millie:I(4)____________(walk)tothebusstop.Sandy,Isawyouandyourparentsstandingonthesideoftheroad.(5)_____________you_____________(wait)forataxi?;Sandy:Yes.Mydad’scarbrokedownbecauseofthecoldweather.①He(6)____________(ring)someonetocomeandhelpwhenyousawus.;B.Usingwhen,whileandas

When,whileandascanbeusedasconjunctionsoftime.Theyallmean“duringthetimethat”.

Iwassleepingwhentheearthquakestarted.

Peoplewererunninginalldirectionswhilepiecesofglassandbrickswerefallingdown.

AsIwastryingtofindmywayout,Isuddenlyheardsomenoiseaboveme.;Note:Whenashorteractionhappenedatthesametimeasalongeraction,weusethepast

continuoustenseforthelongeractionandthesimplepasttensefortheshorteraction.Whenthere

aretwolongactions,weoftenusewhile.

Iftheshorteractionisinthemainclause,wecanusewhen,whileorastojointhem.;When/While/AsMilliewaswatchingTV,Andycameintotheroom.

Ifthelongeractionisinthemainclause,weoftenusewhentojointhem.

MilliewaswatchingTVwhenAndycameintotheroom.

TIP

Weuseacommatoseparatethetwoclausesifwhen,whileorascomesatthebeginningofthesentence.

Whentheearthquakestarted,mostpeopleweresleeping.;Playinginthesnow

SomeClass1,Grade8studentswenttoplayinthesnow.Completet