规则动词的过去式变化如下：

　　（1）一般情况下,动词词尾加ed,

　　如：work—worked；play—played；want—wanted；act—acted

　　（2）以不发音的e结尾动词,动词词尾加d,

　　如：live—lived；move—moved；decide—decided；decline—declined；hope—hoped；

　　（3）以辅音字母+y结尾的动词,把y变为i再加ed,

　　如：studiedtriedcopiedjustifiedcriedcarriedembodiedemptied

　　（4）以一个辅音字母结尾的重读闭音节动词,双写词尾辅音字母,再加ed,

　　如：stoppedbeggedfretteddraggeddroppedplanneddotteddripped

　　（5）注：不规则动词的过去式变化规律性不强,须多加记忆.

　　go-went,

　　make-made,

　　get-got,

　　buy-bought,

　　come-came,

　　fly-flew,

　　is/am-was,

　　are-were,

　　see-saw,

　　bring-brought,

　　do-did,

　　teach-taught,

　　think-thought,

　　say-said,

　　sit-sat.

　　read-read,

　　spend-spent,

　　eat-ate,

　　give-gave,

　　sit-sat,

　　tell-told,

　　write-wrote,

　　feel-felt,

　　find-found,

　　hear-heard,

　　know-knew,

　　put-put,

　　grow-grew,

　　take-took,

　　catch-caught,

　　come-came,

　　become-became,

　　swim-swam,

　　sweep—swept,

　　sing—sang,

　　draw—drew,

　　以上的（1）至（4）条中的发音均有改变,具体分别有/d//t//id/.

　　而不规则动词的过去式的发音则略有不同,但是有些还是按照一定规律变化的.如以上的：make-made,get-got,buy-bought,come-came,fly-flew,bring-brought,teach-taught,think-thought,say-said,sit-sat.read-read,spend-spent,give-gave,tell-told,write-wrote,feel-felt,find-found,hear-heard,know-knew,put-put,grow-grew,take-took,catch-caught,come-came,become-became,swim-swam,sweep—swept,sing—sang,draw—drew.