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1、一、第三人称单数变化规律:i)在动词尾直接加 s。如:playplays, wantwants, workworks, knowknows, helphelps,getgetsii)以字母s、x、ch或o结尾的动词加-es;如:guessguesses, fixfixes, teachteaches, brushbrushes, gogoes,dodoes,watchwatches,catchcatchesiii)以辅音字母y结尾的动词,先变y为i,再加-es。如:studystudies,carrycarries,flyflies,worryworries二、名词复数变化规律:1一般名词复数
2、是在名词后面加上“s”,如mapmaps, bagbags等;2以s, sh, ch, x等结尾的词加“es”,如busbuses, watchwatches等;3以辅音字母y结尾的词,变y为i加es,如babybabies等;以元音字母 y结尾的名词变复数时,直接加s变复数,如monkeymonkeys, holidayholidays, storeystoreys(楼层);4以o 结尾的名词变复数时:a)加s的名词有:photophotos ,pianopianos, radioradios, zoozoosb)加es的名词有:potatopotatoes tomatotomatoes5以f或fe结尾的名词变复数时:a)加s的名词有:beliefbeliefs roofroofssafesafes gulfgulfsb)去掉f, fe 加ves的名词有:halfhalves knifeknivesleafleaves wolfwolveswifewives lifelives thiefthieves