UNIT 4 TOPIC 2 Section A 课件2

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1、UNIT4OurWorldTOPIC2Howcanweprotectourselvesfromtheearthquake?SectionA一般过去时一般过去时【知识精粹】：表示过去存在的状态或过去的动作，要用一般过去时，在句中常常出现过去的词。如：justnow,rightnow,amomentago,yesterday,thedaybeforeyesterday,lastmonth,lastyear等。1.一般过去时是由动词的过去式构成的，过去式即动词的ed形式。(1)一般情况下在词尾加ed。①在元音和浊辅音后读/d/。如：s

2、tay—stayedclimb—climbed②在清辅音后读/t/。如：work—workedlook—lookedhelp—helped(2)以e结尾的动词加d，读音同上。like—likedlive—livedhope—hoped(3)以辅音字母加y结尾的动词去y加ied，读/id/。如：study—studiedtry—triedcarry—carried(4)以重音闭音节结尾，末尾只有一个辅音字母的动词，要双写末尾的辅音字母，再加ed。读音同上。如：jog—joggedstop—stoppedbeg—begged(5)动词

3、的过去式有一些是不规则的，如：be—was/werebecome—becamebegin—beganblow—blewbreak—brokebring—broughtbuild—builtburn—burntbuy—boughtcatch—caughtcome—camecut—cutdo—diddraw—drewdrink—drankeat—atefall—fellfight—foughtfly—flewforget—forgotsit—satsleep—sleptspeak—spokespell—speltswim—swamsw

4、ing—swungtake—tookteach—taughttell—toldthink—thoughtthrow—threwwear—worewin—wonwrite—wroteget—gotgive—gavegrow—grewhave—hadhear—heardhold—heldkeep—keptknow—knewlearn—learntleave—leftlose—lostmake—mademean—meantmeet—metput—putread—readride—rodering—rangrun—ransay—saids

5、ee—sawshake—shookshow—showedsing—sang2.一般过去时的运用(1)be动词变成was，were，其中am，is→was，are→were。(2)行为动词一般加-ed，没有人称、单复数之分。(3)行为动词变成问句和否定句时将do/does→did，同时动词用原形。【例题点睛】：—How______you_______there?—Bybus.A.did；wentB.did；goC.do；goes【例题点睛】：在过去分词一般疑问句中，句首do变为did，句子中的动词用原形。【答案】：—Howdidyo

6、ugothere?—Bybus.A.did；wentB.did；goC.do；goesIwentswimminglastSunday.Brighton布莱顿LastsummerIvisitedtoBrighton.LastnightIplayedthepiano.Ihadapicnicwithmyfamilylastweek.Practice1)-What____you___yesterday?-I______myMomathome.2)I______thefootballlastSundayafternoon.3)We_____

7、_toschoolLastMonday.4)I_____afriendlastmonth.diddohelpedplayedwentvisitedPractice5)-Whatdidyoudoyesterday?-I______basketballontheplayground.A.playB.playedC.plaied6)-Whatdidyoudolastmonth?-I______toShanghaiwithmydad.A.visitedB.visitC.visitted