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1、变形规则可数名词的复数形式可数名词才有复数形式不可数名词主要是抽象名词和物质名词,做主语时谓语用单数集体名词没复数形式但做主语时谓语通常用复数statesman,mouse,mosquito,monkey,passer-by,watch,button,brochure,universitystatesmen,mice,mosquitoes,monkeys,passers-by,watches,buttons,brochures,universities1.一般在词尾加-smap-maps,bridge-bridge
2、s2.以-s,-x,-sh,-ch结尾的加-esglass-glasses,brush-brushes3.以o结尾的有生命的名词后加-eshero-heroes,potato-potatoes以o结尾的无生命的名词以及-oo结尾的词后加-spiano--pianos,zoo--zoos4.以辅音加y结尾的词变y为i加es;以元音加y结尾的词直接加sfactory-factories;boy-boys5.以-f或-fe结尾的词,把-f,-fe改为V,再加-eswolf-wolves,leaf-leaves有的以-f,
3、-fe结尾的词,可以直接加-sbelief-beliefs,roof--roofs不规则变化1.bacterium-bacteria;medium-media;criterion-criteriaphenomenon-phenomena2.businessman-businessmenpoliceman-policemenpostman-postmensalesman-salesmenspokesman-spokesmenstatesman-statesmen3.goose-geese;tooth-teeth;fo
4、ot-feet4.mouse-mice;ox-oxen;child-childrendeer-deer;fish-fish;sheep-sheep5.means-means;analysis-analysesstamach-stamachsleaf-leaves;knife-kniveslife-lives;shelf-shelvesthief-thieves;wolf-wolves动词的单三变写出下列动词的单数第三人称形式1.swim2.draw3.make4.run5.carry6.leave7.arrive8
5、.watch9.clean10.stay写出下列动词的单数第三人称形式1.swims2.draws3.makes4.runs5.carries6.leaves7.arrives8.watches9.cleans10.stays动词的第三人称单数规则当主语是第三人称(she、he、it)或名词时,谓语动词要用单数形式。一般情况下动词的第三人称单数形式都是直接加s动词单数形式:1、动词以ch、sh、o、s、x结尾时,单数形式要加es2、动词以元音字母+y结尾时,在y后直接加s;动词以辅音字母+y结尾时,把y变成i再加e
6、s3、be动词的现在时包括am、is、are。第三人称单数要用is;have的第三人称单数是has动词的-ed形式写出下列单词的过去式和过去分词1.flow2.stick3.bite4.identify5.receive6.aim7.limit8.yell9.ban10.admit1.flow-flowed-flowed2.stick-stuck-stuck3.bite-bit-bitten4.identify-identified-identified5.receive-received-received6.ai
7、m-aimed-aimed7.limit-limited-limited8.yell-yelled-yelled9.ban-banned-banned10.admit-admitted-admitted规则动词的过去分词与规则动词的过去式的构成规则相同。1一般动词,在词尾直接加“ed”work---workedvisit---visited2以“e”结尾的动词,只在词尾加“d”live---lived3以“辅音字母+y”结尾的动词,将“y”变为“i”,再加“ed”study---studied---studied4
8、重读闭音节结尾,末尾只有一个辅音字母,双写该辅音字母,再加“ed”stop---stopped动词的-ing形式写出下列单词的-ing形式violatewindswallowscanreferquarrelbreathebeginwriteforgivetietry写出下列单词的-ing形式violatingwindingswallowingscanning