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时间:2020-03-17
《小学生英语过去式、现在分词、三单.doc》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、规则动词的过去式由“动词原形+-ed”构成,具体变化有:1.直接在词尾加-ed。如:want—wanted,work—worked,need—needed,clean—cleaned2.以不发音的e结尾的在词尾加-d。如:like—liked,live—lived,use—used,move—moved3.以一个元音字母加一个辅音字母结尾的重读闭音节动词,先双写结尾的辅音字母,再加-ed。如:stop—stopped,trip—tripped4.以辅音字母加y结尾的动词,先把y变成i,再加-ed。如:study
2、—studied,carry—carried,hurry—hurried,marry—married不规则动词的过去式见课本后的不规则动词表。大体上归纳有以下六条记忆法:1.以t结尾的词,过去式与原形相同。如:put—put,let—let,cut—cut,beat—beat2.以d结尾的词,把d变成t。如:build—built,lend—lent,send—sent,spend—spent3.以n结尾的词,在词后加t。如:mean—meant,burn—burnt,learn—learnt4.以ow/aw结
3、尾的词,把ow/aw变成ew。如:draw—drew,know—knew5.含有双写字母的词,将双写改为单写,在词尾加t。如:keep—kept,feel—felt,smell—smelt6.含有元音字母o/i的词,将o/i变成a。如:sing—sang,give—gave,sit—sat,drink—drank现在分词的构成方法如下:1.一般情况下,直接在动词原形后面加-ing.goingaskingfindingworkingbeingseeingprintingrainingstandingstudyin
4、gspeaking2.以不发音的-e结尾的动词,去-e,再加-ing。comingtakingfiringencirclingwritingbecomingbreathingleaving3.闭音节的单音节词,或以重读闭音节结尾的多音节词,这些词的末尾只有一个辅音字母时,双写这个辅音字母,再加-ing.sittingrunninggettingcuttingstoppingbeginningplanningpermitting一般现在时主语三单时的动词变化①在一般现在时中,当主语为第三人称单数时,动词要用“s”
5、型(即第三人称单数形式)。②所谓动词“s”型的构成,可按名词变复数的规则来记,即:i)在动词尾直接加s。如:play—plays,want—wants,work—works,know—knows,help—helps,get—getsii)以字母s、x、ch或o结尾的动词加-es;如:guess—guesses,fix—fixes,teach—teaches,brush—brushes,go—goes,do—does,watch—watches,catch—catchesiii)以辅音字母+y结尾的动词,先变y
6、为i,再加-es。如:study—studies,carry—carries,fly—flies,worry—worries③主语是第三人称单数的肯定句变为否定和疑问句。1)Hismotherworksinafactory.Hismotherdoesn’tworkinafactory.Doeshismotherworkinafactory?2)MrLiteachesusEnglish.MrLidoesn’tteachusEnglish.DoesMrLiteachyouEnglish?
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