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(读音是[red])
hurt hurt hurt 伤
set set set 放置
2. A---A---B型（现在式和过去式同形）
beat beat beaten/ beat 打
3. A---B---A型（现在式和过去分词同形）
come came come 来
become became become 变
run ran run 跑
overcome overcame overcome 战胜，克服
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
lose lost lost 失去
send sent sent 送
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
catch caught caught 抓住
teach taught taught 教
fight fought fought 战斗
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
feel felt felt 觉得
find found found 发现
hang hanged hanged 绞死
show showed showed/ shown 展示
hang hung hung 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/ digged dug/ digged 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。
be was/ were been 是
eat ate eaten 吃
fall fell fallen 落下
give gave given 给
take took taken/ took拿
hide hid hidden/ hid 隐藏
see saw seen 看见
write wrote written 写
ride rode ridden 骑
rise rose risen 升起
drive drove driven 驾驶
(2)过去式将-aw, -ow, -y变为-ew，过去分词在原形后加-n，其中“fly”的过去分词是将“y”改为“ow”再加“n”。
blow blew blown 吹
grow grew grown 生长
know knew known 知道
throw threw thrown 抛，扔
draw drew drawn 拉，绘画
fly flew flown 飞
(3)过去式加-n或-en构成过去分词，其中“wear”的过去分词是将“e”改为“n”。
wear wore worn 穿
freeze froze frozen 冻结
steal stole stolen 偷
speak spoke spoken 说话
tread trod trodden/ trod 行走
break broke broken 破碎，折断
choose chose chosen 选择
weave wove/ weft woven/ weft 编织
wake waked/ woke waked/ waken 醒
get got gotten/ got得
forget forgot forgotten/ forgot忘记
(4)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
drink drank drunk 饮
ring rang/ ringed rung/ ringed 按铃
sing sang/ sung sung 唱
swim swam swum 游泳
spin span/ spun spun 旋转
sink sank/ sunk sunk/ sunken 沉
spring sprang/ sprung sprung 跳跃
(5)其他不规则动词的变化。
do did done 做
lie lay lain 躺
6. 情态动词（无过去分词）
can could 能
may might 可以
must / 必须
shall should 应该
will would 将/会