規則動詞的過去式變化如下：

　　一般情況下，動詞詞尾加 -ed ，如：

　　worked played wanted acted

　　以不發音的 -e 結尾動詞，動詞詞尾加 -d，如： lived moved decided declined hoped judged raised wiped

　　以輔音字母 + y結尾的動詞，把-y變為-i 再加-ed，如：

　　studied tried copied justified cried carried embodied emptied 以一個輔音字母結尾的重讀閉音節動詞，雙寫詞尾輔音字母，再加 -ed，如： stopped begged fretted dragged dropped planned dotted dripped 注：不規則動詞的過去式變化規律性不強，須多加記憶。

　　go - went make - made get - got buy - bought come - came fly-flew