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→shedsplit→splitspread→spreadburst→burst)

　　2．元音字母的变化.

　　i→abegin→began,drink→drank,ring→rang,sing→sang,swim→swam,give→gave,sit→sat,sink→sank

　　i→odrive→drove,ride→rode,shine→shone,write→wrote,rise→rose,win→won,(strive→strovearise→arose)

　　i→oufind→found(wind→wound,bind→bound,grind→ground)

　　a→ootake→took,shake→shook

　　e→oget→got,forget→forgot

　　o→acome→came,become→became

　　oo→oshoot→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