（1）一般情況下,動詞詞尾加 ed ,如：
　　work—worked； play—played；want— wanted； act—acted
　?。?）以不發(fā)音的 e 結(jié)尾動詞,動詞詞尾加 d,如：
　　live—lived； move—moved； decide—decided； decline—declined； hope—hoped；
　?。?）以輔音字母 + y結(jié)尾的動詞,把y變?yōu)閕 再加ed,如：
　　studied tried copied justified cried carried embodied emptied
　?。?）以一個輔音字母結(jié)尾的重讀閉音節(jié)動詞,雙寫詞尾輔音字母,再加 ed,如：
　　stopped begged fretted dragged dropped planned dotted dripped
　?。?）注：不規(guī)則動詞的過去式變化規(guī)律性不強,須多加記憶.
　　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）條中的發(fā)音均有改變,具體分別有/d/ /t/ /id/.
　　而不規(guī)則動詞的過去式的發(fā)音則略有不同,但是有些還是按照一定規(guī)律變化的.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.
　　仔細看一看,能發(fā)現(xiàn)它們的一些變化規(guī)律,也就是說不需要死記硬背這些過去式,知道了原型和變化規(guī)律,就可以寫出來了.有的變化部分讀音也是有規(guī)律的.分類記憶是對學習過去式很有幫助的!