巧记不规则动词
（1）原形、过去式、过去分词相同：
cast／cost／cut／hit／hurt／let／put／broadcast／burst／read／red／set／shut／spread／thrust／upset
（2）原形、过去式相同，过去分词不同：
beat／beat／beaten
（3）原形、过去分词相同，过去式不同：
come／came／come become／became／become run／ran／run overcome／overcame／overcome
（4）原形不同，过去式，过去分词相同：
feel／felt／felt sleep／slept／slept leave／left／left smell／smelt／smelt
keep／kept／kept creep／crept／crept kneel／knelt／knelt sweep／swept／swept
spell／spelt／spelt weep／wept／wept catch／caught／caught fight／fought／fought
teach／taught／taught think／thought／thought stand／stood／stood lay／laid／laid
understand／understood／understood pay／paid／paid bleed／bled／bled say／said／said
feed／fed／fed stick／stuck／stuck lead／led／led strike／struck／struck
meet／met／met tell／told／told learn／learnt／learnt sell／sold／sold
learn／learned／learned win／won／won burn／burnt／burnt wind／wound／wound
burn／burned／burned have（has）／had／had deal／dealt／dealt hear／heard／heard
mean／meant／meant lean／leant／leant dream／dreamt／dreamt lean／ leaned／leaned
bend／bent／bent shine／shone／shone build／built／built shoot／shot／shot
lend／lent／lent show／showed／shown spend／spent／spent show／showed／／showed
flee／fled／fled sit／sat／sat speed／sped／sped lose／lost／lost
speed／speeded／speeded dig／dug／dug spit／spit／spit hold／held／held
spit／spat／spat get／got／got（AmE gotten） bring／brought／brought find／found／found
light／lit／lit make／made／made light／lighted／lighted buy／bought／bought
（5）三者均不同：
drive／drove／driven blow／blew／blown rise／rose／risen fly／flew／flown
wake woke／woken grow／grew／grown do／did／done know／knew／known
go／went／gone throw／threw／thrown see／saw／seen prove／proved／proven
eat／ate／eaten break／broke／broken fall／fell／fallen choose／chose／chosen
give／gave／given freeze／froze／frozen shake／shook／shaken speak／spoke／spoken
take／took／taken steal／stole／stolen mistake／mistook／mistaken weave／wove／woven
forbid／forbad／forbidden begin／began／begun forget／forgot／forgotten drink／drank／drunk
ride／rode／ridden ring／rang／rung hide／hid／hidden sing／sang／sung
write／wrote／written sink／sank／sunk wear／wore／worn swim／swam／swum
（6）相同动词因其过去式、过去分词有两形式而产生不同词义：
speed过去式、过去分词有两种：sped／sped快行 speeded／speeded加速
light过去式，过去分词有两种：lit／lit点着（表语） lighted／lighted供电，点燃的（定语）
shine过去式、过去分词有两种：shone／shone／照耀 shined／shined擦亮
hang过去式、过去分词有两种：hung／hung悬挂 hanged／hanged绞死
（7）drunken，stricken，sunken已转为形容词常作定语
a～ sot酒鬼 in a～manner摇摇晃晃地
（8）lie躺卧lay／lain／lying（现在分词）
lie撒谎 lied／lied／lying
lay放，下蛋laid／laid／laying
（9）come，become，overcome属不规则变化，但welcome属规则动词，其过去式、过去分词为：welcomed，welcomed
（10）fly，blow不是规则变化，但flow（流）是规则变化，过去式、过去分词为flowed，flowed.
（11） find发现 found found；found创建 founded founded
wind绕 wound wound；wound伤害 wounded wounded
see看见 saw seen；saw锯 sawed sawed
bear作“出生”， 过去分词有两种：born，borne。
borne用于have之后及带有by的被动句中；born用于be born in／on／at中。
作“出生”以外意义，其形式为bear／bore／borne忍受。