常见动词过去式过去分词的变化规则
动词过去式和过去分词有规则变化和不规则变化两种。
一、规则变化:
1. 一般情况直接加ed，如ask—asked, work—worked
2. 以不发音的e结尾，只加d，如love—loved, dance—danced
3. 以辅音字母加y结尾，把y变为i，再加ed，如try—tried, study—studied
4. 以一个元音字母和一个辅音结尾的重读闭音节结尾的动词(以重读闭音节或r 音节结尾而末尾只有一个辅音字母),先双写末尾这个辅音字母,再加ed,如stop—stopped, permit—permitted 注：A. 以l结尾的动词,尾音节重读时,双写l,如control—controlled;尾音节不重读时,双不双写都可以，如travel—traveled(美) /travelled(英) 。
B. 特例:
picnic—picnicked—picnicked(去野餐),traffic—trafficked—trafficked（交易,在…通行）另外,还有很多动词的过去式和过去分词是不合乎上述规则的,需要熟记.(见后)
C. 读音与说明:
①.-ed在清辅音音素后发音为[t]: helped, liked, finished, fetched, stopped, clapped ①.-ed在浊辅音和元音后发音为[d]: believed, changed, planned, preferred, followed, stayed
①.-ed在[t]、[d] 后发音为[id]: wanted, needed, admitted, permitted
二、不规则变化
⒈ A---A---A型（现在式、过去式、过去分词同形）
动词原形（现在式）过去式过去分词
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
⒉ A---A---B型（现在式和过去式同形）
beat beat beaten 打
⒊ 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
⒋ A ---B ---B型
⑴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
⑵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
⑶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
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
⒌ A---B---C型（现在式、过去式和过去分词都不相同）⑴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
⑵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
⑶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
drink drank drunk 饮
⑷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。