1．无变化，过去式与原形相同。
let→let, put→put, hit→hit, must→must, set→set, beat→beat, cast→cast, cost→cost, cut→cut, hurt→hurt, read→red, shut→shut (shed→shed split→split spread→spread burst→burst)
2．元音字母的变化。
i→a begin→began, drink→drank, ring→rang, sing→sang, swim→swam, give→gave, sit→sat, sink→sank
i→o drive→drove, ride→rode, shine→shone, write→wrote, rise→rose, win→won, (strive→strove arise→arose)
i→ou find→found (wind→wound, bind→bound, grind→ground) a→oo take→took, shake→shook
e→o get→got, forget→forgot
o→a come→came, become→became
oo→o shoot→shot, choose→chose
3．元音字母组合的变化。
aw/ow/y→ew, draw→drew, blow→blew, grow→grew, know→knew, throw→threw, fly→flew
4．元音字母和辅音字母都有变化。
(1) sell→sold, tell→told, retell→retold
(2) say→said, pay→paid, lay→laid, relay→relaid
(3)sweep→swept, keep→kept, sleep→slept, creep→crept
(4)bring→brought, buy→bought, think→thought, fight→fought
(5)catch→caught, teach→taught
(6) can→could, will→would, shall→should
5．辅音字母变化。
（1）build→built, send→sent, bend→bent, lend→lent, rend→rent, spend→spent
（2）make→made, have→had, hear→heard
（3）mean→meant, learn→learnt