过去式，表示过去某个时间里发生的动作或状态。一般过去式的动词通常用动词原形的过去式形式来表示，而动词的过去式是在动词原形的基础上变化的。动词的过去式可分为规则动词和不规则动词。那么动词过去式和过去分词不规则变化是怎样的呢？
1．原形-过去式-过去分词全相同
cost—cost—cost价值
cut—cut—cut切，割，砍
hit—hit—hit打
hurt—hurt—hurt伤害
read/ri:d/—read/red/—read/red/读
put—put—put放
let—let—let让
shut—shut—shut关
2.过去分词与原形相同,过去式改o/u为a
become—became—become变得，成为
come—came—come来
run—ran—run跑
3.原形-过去式-过去分词是i-a-u的变化
begin—began—begun开始
drink—drank—drunk喝
ring—rang—rung打电话
sing—sang—sung唱（歌）
swim—swam—swum游泳
4.过去分词在原形后加-en
eat—ate—eaten吃
fall—fell—fallen落下；跌倒
5.过去式和过去分词都去掉原形的一个e
feed—fed—fed喂养，饲养
meet—met—met碰到，见面，会面
6.过去分词在原形后加-n
blow—blew—blown吹
grow—grew—grown种植；生长
throw—threw—thrown投；掷；扔
know—knew—known知道；懂得；认为
draw—drew—drawn画
fly—flew—flown飞
see—saw—seen看见，看到
show—showed—shown出示；给...看
give—gave—given给
drive—drove—driven驾驶
take—took—taken拿去;带去
7.过去分词以-en结尾
bite—bit—bitten咬
ride—rode—ridden骑(车,马等)
write—wrote—written写
hold—held—holden握住
break—broke—broken弄坏,弄破
choose--chose--chosen选择
speak—spoke—spoken讲话;演讲
wake—woke—woken使...醒来;弄醒
forget—forgot—forgotten忘记
get—got—gotten得到
hide—hid—hidden躲,藏
8.过去分词以-ne结尾
do—did—done做,干
go—went—gone去
9.过去式与过去分词都有aught结尾
catch—caught—caught捉住;抓住
teach—taught—taught教
10.过去式和过去分词都以-ought结尾
bring—brought—brought拿来;带来
buy—bought—bought买
fight—fought—fought打架;打仗
think—thought--thought想;认为
seek—sought--sought寻求
11.过去式和过去分词都在原形后加d或t
hear--heard--heard听见;听说
mean--meant--meant意思是
12.过去式和过去分词都以elt,eft或ept结尾
feel—felt—felt感觉
keep—kept—kept保持
sleep—slept—slept睡觉
leave—left—left离开
