1. A---A---A型(现在式、过去式和过去分词同形)
cost cost cost 花费
cut cut cut 割，切
hit hit hit 打
let let let 让
put put put 放下
read read read 读
hurt hurt hurt 伤
2. A---A---B型(现在式和过去式同形)
beat beat beaten 打
3. A---B---A型(现在式和过去分词同形)
come came come 来run ran run 跑
become became become 变
4. A ---B ---B型
(1)在动词原形后加一个辅音字母d或t构成过去式或过去分词。
burn burnt burnt 燃烧
learn learned/learnt learned/learnt 学习
mean meant meant 意思hear heard heard 听见
(2)把动词原形的最后一个辅音字母“d”改为“t” 构成过去式或过去分词。
build built built 建筑lend lent lent 借给
send sent sent 送lose lost lost 失去
spend spent spent 花费
(3)其他
pay paid paid 付
lay laid laid 下蛋
say said said 说
bring brought brought 带来
buy bought bought 买
think thought thought 想
sleep slept slept 睡
keep kept kept 保持
sweep swept swept 扫
stand stood stood 站
understand understood understood 明白
win won won 得胜
shine shone/shined shone/shined 发光
catch caught caught 抓住
teach taught taught 教
feel felt felt 觉得
fight fought fought 战斗
find found found 发现get got got 得到
hang hanged/ hung hanged/ hung 绞死，挂
have had had 有
hold held held 盛，握
leave left left 离开
make made made 制造
meet met met 遇见
sell sold sold 卖
shoot shot shot 射击
tell told told 告诉
smell smelt/smelled smelt/smelled 嗅，闻
sit sat sat 坐
dig dug dug 挖
5. A---B---C型(现在式、过去式和过去分词都不相同)
(1)在动词原形后加-n或-en构成过去分词。
eat ate eaten 吃fall fell fallen 落下
steal stole stolen 偷
give gave given 给
freeze froze frozen 冻结
take took taken 拿
see saw seen 看见
write wrote written 写
ride rode ridden 骑
drive drove driven 驾驶
throw threw thrown 抛，扔
blow blew blown 吹
grow grew grown 生长
know knew known 知道fly flew flown 飞
draw drew drawn 拉，绘画
show showed shown 展示
(2)过去式加-n或-en构成过去分词。
speak spoke spoken 说话
break broke broken 破碎，折断
wake waked/ woke waked/ waken 醒
choose chose chosen 选择
forget forgot forgotten 忘记
(3)变单词在重读音节中的元音字母“i”分别为“a”(过去式)和“u”(过去分词)。
begin began begun 开始
ring rang rung 按铃sing sang sung 唱
sink sank sunk 沉
swim swam swum 游泳sing sang sung 唱
(4)其他不规则动词的变化。
be(am, is) was/ were been 是
be(are) were been 是
do did done 做go went gone 去
lie lay lain 躺wear wore worn 穿
