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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study——studied。

　　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stop——stopped。

　　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：

　　sit —— sat throw —— threw am, is —— was

　　drink —— drank draw —— drew are —— were

　　sing —— sang fly ——flew do —— did

　　begin —— began grow —— grew have, has —— had

　　swim —— swam put —— put may —— might

　　give —— gave cut —— cut can —— could

　　ring —— rang let —— let shall ——should

　　run —— ran read —— read will —— would

　　ride —— rode catch —— caught go —— went

　　write —— wrote teach —— taught eat —— ate

　　drive —— drove think —— thought hear —— heard

　　keep —— kept buy —— bought see —— saw

　　sleep —— slept fight —— fought find —— found

　　sweep —— swept hold —— held wear —— wore

　　feel —— felt tell —— told meet —— met

　　come —— came get —— got mean —— meant

　　become —— became make —— made speak —— spoke

　　take —— took say —— said

　　1)is, am -was are-were

　　2) begin-began ring-rang drink-drank swim-swam give-gave

　　sing-sang sit-sat run-ran have-had make-made

　　come-came eat-ate

　　3) write-wrote ride-rode speak-spoke drive-drove stand-stood

　　tell-told win-won get-got take-took

　　4) sleep-slept sweep-swept feel-felt keep-kept

　　spell-spelt spend-spent bend-bent

　　meet-met go-went

　　5) know-knew fly-flew blow-blew grow-grew

　　throw-threw draw-drew (glow-glowed)

　　6) teach-taught catch-caught buy-bought

　　fight-fought think-thought

　　7) find-found hear-heard say-said lie-lay

　　see-saw learn-learnt mean-meant

　　8) put-put read-read cut-cut let-let

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