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当主语是第三人称单数时，动词形式有以下几种变化：规则动词原形第三人称单数形式一般动词在词尾加-s,在清辅音后读/s/，在浊辅音或元音后读/z/，在t后读/ts/，在d后读/ds/。helplikeswimlistenknowplaygetfindhelps/helps/likes/laiks/swims/wimz/listens/’lisənz/knows/nəʊz/plays/pleiz/gets/gets/finds/faindz/以字母s,x,sh,ch结尾的动词加-es,读/iz/。如果动词原形词尾已有e，则加s。以o结尾的动词也加-es，读/z/。teachgoteachesgoes以辅音字母加y结尾的动词，先边y为i，再加-es，读/z/。studystudiessit--guess--die--go--rush--reach--touch--brush--fly--copy--say--run--do--fix--live--cry--enjoy--have--wish--play--Tie--teach--buy--study--drink--go--stay--make--look--carry--come--watch--plant--fly--do--二、用括号内动词的适当形式填空。1.Heoften________(have)dinnerathome.2.DanielandTommy_______(be)inClassOne.3.We_______(notwatch)TVonMonday.4.Nick_______(notgo)tothezooonSunday.5.______they________(like)theWorldCup?6.What_______theyoften_______(do)onSaturdays?7._______yourparents_______(read)newspaperseveryday?8.Thegirl_______(teach)usEnglishonSundays.9.SheandI________(take)awalktogethereveryevening.10.There________(be)somewaterinthebottle.11.Mike_______(like)cooking.12.They_______(have)thesamehobby.13.Myaunt_______(look)afterherbabycarefully.14.Youalways_______(do)yourhomeworkwell.15.I_______(be)ill.I’mstayinginbed.16.She_______(go)toschoolfromMondaytoFriday.17.LiuTao_______(do)notlikePE.18.Thechildoften_______(watch)TVintheevening.19.SuHaiandSuYang_______(have)eightlessonsthisterm.20.－Whatday_______(be)ittoday?－It’sSaturday