动词的过去式形式规则动词的过去式词尾变化有几种：1一般情况下加ed，如watched,planted,watered,pulled,climbed,picked。2以不发音字母e结尾的加d，如liked,moved,tasted。3以辅音字母加y结尾的变y为i再加ed，如studystudied。4以1个元音字母加1个辅音字母结尾的重读闭音节，双写最后一个辅音字母再加ed，如stopstopped。词尾读音有3种：a在浊辅音和元音后读d，如lived,watered,listened,played。b在清辅音后读t，如liked,helped,watched。c在t,d音后读Id，如planted,wanted,handed(上交)。不规则动词的过去式变化则没有什么规律，请大家背熟记牢：sitsat throwthrew am,iswasdrinkdrank drawdrew areweresingsang flyflew dodid beginbegan growgrew have,hashad swimswam putput maymight givegave cutcut cancould ringrang letlet shallshould runran readread willwould riderode catchcaught gowent writewrote teachtaught eatate drivedrove thinkthought hearheardkeepkept buybought seesaw sleepslept fightfought findfound sweepswept holdheld wearwore feelfelt telltold meetmet comecame getgot meanmeant becomebecame makemade speakspoke taketook saysaid1）is,am-wasare-were2)begin-beganring-rangdrink-drankswim-swamgive-gavesing-sangsit-satrun-ranhave-hadmake-madecome-cameeat-ate3)write-wroteride-rodespeak-spokedrive-drovestand-stoodtell-told win-wonget-gottake-took4)sleep-sleptsweep-sweptfeel-feltkeep-keptspell-speltspend-spentbend-bentmeet-metgo-went5)know-knewfly-flewblow-blewgrow-grewthrow-threwdraw-drew(glow-glowed)6)teach-taughtcatch-caughtbuy-boughtfight-foughtthink-thought7)find-foundhear-heardsay-saidlie-laysee-sawlearn-learntmean-meant8)put-putread-readcut-cutlet-let过去式walk走_climb爬_turn转弯_learn学习_cookdinner做饭_playthepiano弹钢琴_visitgrandparents看望（外）祖父母_cleanthebedroom打扫卧室_washtheclothes洗衣服_answerthephone接电话_listentomusic听音乐_cleantheroom打扫房间_jump跳_ row划_work工作_ show展示_look看_ help帮助_relax放松_ return归还_pass传递_ watchTV_pickupleaves采摘树叶_paint绘画_ kick踢_ ski滑雪_like像，喜欢_ live居住_dance跳舞_ useacomputer使用计算机_love爱_ taste尝_ close关上_ prepare准备_eat吃_ have有；吃 _ buy买 _ take买；带_ go去_ sing唱歌_ teach教_ run跑 _ fight打架_ get up起床_ swim游泳_ fly飞_do做_ make the bed铺床_is_ am_ are_ see看到_write_ catch_ find_ drink_come_ bring_ think_ 比较级1. My school is _, but Toms school is _than mine. And Sallys school is the _. (small) 2. Rabbits can run _, but tigers can run _ than rabbits, and cheetahs can run _of the three. (fast) 3.Pig is _, but deer is _than pig, and elephant is the _ (heavy) 4. Im _, but she is _ than me. (beautiful) 5. Every day is _. But today is the _ day I have ever had. (busy) 6. I think pizza is the _ food of all. (delicious) 7My brother is two years _ (old) than me. 8. Is your sister _(young) than you? Yes,she is. 9. Who is _(thin),you or Helen? Helen is. 10. Whose pencil-box is _ (big),yours or hers? Hers is. 11Ben jumps _ (high) than some of the boys in his class. 12Doe