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