会计学可数名词的复数(fùshù)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(jítǐ)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(yībān)在词尾加-smap-maps,bridge-bridges2.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(jiéwěi)的词变y为i加es;以元音加y结尾(jiéwěi)的词直接加sfactory-factories;boy-boys5.以-f或-fe结尾(jiéwěi)的词，把-f,-fe改为V,再加-eswolf-wolves,leaf-leaves有的以-f,-fe结尾(jiéwěi)的词，可以直接加-sbelief-beliefs,roof--roofs不规则变化(biànhuà)2.businessman-businessmenpoliceman-policemenpostman-postmensalesman-salesmenspokesman-spokesmenstatesman-statesmen3.goose-geese;tooth-teeth;foot-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(dìsānrénchēnꞬ)形式1.swim2.draw3.make4.run5.carry6.leave7.arrive8.watch9.clean10.stay写出下列动词的单数第三人称(dìsānrénchēnꞬ)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(míngcí)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es3、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(xíngshì)写出下列单词(dāncí)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.aim-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(fǔyīn)字母+y”结尾的动词，将“y”变为“i”，再加“ed”study---studied---studied4重读闭音节结尾，末尾只有一个辅音(fǔyīn)字母，双写该辅音(fǔyīn)字母，再加“ed”stop---stopped动词