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→shut2．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→... |
