不规则动词变化口诀：
1）A---A---A型（现在式、过去式和过去分词同形，保持不变，除进行式外）
动词原形 过去式 过去分词 意思
cost cost cost 花费
cut cut cut 割，切
hit hit hit 打
put put put 放下
read # read read 读
hurt hurt hurt 受伤
let let let 让
# “Read” 的“过去式”和“过去分词”的读音和动词原型的不同。
2） A---A---B型（现在式和过去式同形）
动词原型 过去式 过去分词 意思
beat beat beaten 打
3） A---B---A型（现在式和过去分词同形）
动词原形 过去式 过去分词 意思
come came come 来到
become became become 变
run ran run 跑
overcome overcame overcome 征服，打败
4）A---B---B型（过去式与过去分词同形）
分为以下情形：
① 在动词原形后加一个辅音字母d或t。
动词原形 过去式 过去分词 意思
burn burnt burnt 燃烧
learn learned / learnt learned / learnt 学习
mean meant meant 含义是
hear heard heard 听见
② 把动词原形的最后一个辅音字母“d”改为“t”。
动词原形 过去式 过去分词 意思
build built built 建筑
lend lent lent 借
send sent sent 传送
spend spent spent 花费
③ 其他不规则的各种变化。
动词原形 过去式 过去分词 意思 动词原形 过去式 过去分词 意思
pay paid paid 付钱 lay laid laid 下蛋
say said said 说 bring brought brought 带来
buy bought bought 买 fight fought fought 战斗
think thought thought 思考 sleep slept slept 睡觉
feel felt felt 觉得 keep kept kept 保持
sweep swept swept 扫 stand stood stood 站
understand understood understood 理解 win won won 胜利
catch caught caught 抓住 teach taught taught 教
find found found 发现 get got got 得到
hold held held 握 leave left left 离开
make made made 制造 meet met met 遇见
shoot shot shot 射击 dig dug dug 挖
smell smelt / smelled smelt / smelled 嗅，闻 shine shone / shined shone / shined 发光
sit sat sat 坐下 have had had 有
5）A---B---C型（三词不同形）
分为以下情形：
① 在动词原形后加-n或-en 构成过去分词 。
动词原形 过去式 过去分词 意思
eat ate eaten 吃 fall fell fallen 落下
give gave given 给 take took taken 拿，记录，拍摄
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
show showed shown 展示 draw drew drawn 拉，绘画，抽签
② 过去式加-n或-en构成过去分词。
动词原形 过去式 过去分词 意思
speak spoke spoken 说话
break broke broken 破碎
choose chose chosen 选择
forget forgot forgotten 忘记
freeze froze frozen 凝固
③ 把单词在重读音节中的元音字母“i”变成“a”（过去式）和“u”（过去分词）。
动词原形 过去式 过去分词 意思
begin began begun 开始
ring rang rung 按铃
sing sang sung 唱
sink sank sunk 沉
swim swam swum 游泳
drink drank drunk 喝
④ 其他不规则动词的变化。
动词原形 过去式 过去分词 意思
be (am, is) was been 是
be (are) were been 是
do did done 做
go went gone 去
lie lay lain 躺
wear wore worn 穿
