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不规则动词的变化可分七种形式。
第一种，过去式是用 “元音变化(即互换或增减)” 或加 “-ed”， 过去分词是加“-(e)n”。例如：
bear bore born shear 修剪 sheared shorn
bid bade bidden show showed shown
bite bit bitten shrink shrank shrunken
blow blew blown shrive shrove shriven
break broke broken sink sank sunken
choose chose chosen slay slaw slain
cleave clove cloven slide slid slidden
do did done smite smote smitten
draw drew drawn sow sowed sewn
drive drove driven speak spoke spoken
eat ate eaten steal stole stolen
fall fell fallen strew strewed strewn
fly flew flown stride strode stridden
freeze froze frozen strike struck stricken
get got gotten strive strove striven
give gave given swear swore sworn
grow grew grown take took taken
hide hid hidden tear tore torn
grave graved graven thrive throve thriven
hew hewed hewn throw threw thrown
beat beat beaten tread trod trodden
swell swelled swollen wake woke woken
know knew known wear wore worn
lade laded laden weave wove woven
melt melted molten write wrote written
mow mowed mown
rive rived riven be was, were been
saw sawed sawn go went gone
lie lay lain
ride rode ridden
rise rose risen
see saw seen
sew sewed sewn
shake shook shaken
第二种，动词的变化仅用 “元音变化”。
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逢-n 逢-d 或 -t
begin began begun bleed bled bled
bind bound bound breed bred bred
cling clung clung feed fed fed
drink drank drunk shoot shot shot
find found found sit sat sat
grind ground ground speed sped sped
hang hung hung spit spat spat
ring rang rung lead led led
run ran run meet met met
shine shone shone chide chided, chid chided, chid
sing sang sung bide bided, bode bided
sling 吊起 slung slung
slink 鬼鬼祟祟地走 slunk slunk 逢-g 或-ck
spin spun spun dig dug dug
spring sprang sprung fight fought fought
sting stung stung stick stuck stuck
stink stank stunk
string strung strung 逢-v或 –w
swing swung swung stave stove stove
win won won heave hove hove
wind wound wound crow crowed, crew crow
wring wrung wrung
逢-ld
逢-m hold held held
come came come
swim swam swum light lit lit
最后的light, -igh- 发/ai/音，变为lit后为/lit/; 由/ai/到/i/, 也是元音互换。
第三种，过去式和过去分词的尾字母变为 “t”。这部分的词又分三类：1，词尾是d，改为t。2，直接加t。3，词尾是双写字母ll，改末字母l为t(或d)。规则动词的变化是加 –ed, 因 d和 t音近，属于d类音的辅音通转，故这类变化可以理解。
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bend bent bent
blend blent blent lose lost lost
build built built bless blest blest
gild gilt gilt 3
gird girt girt dwell dwelt dwelt
lend lent lent smell smelt smelt
rend rent rent spell spelt spelt
send sent sent spill spilt spilt
2 sell sold sold
burn burnt burnt tell told told
lean leant leant
learn learnt learnt
mean meant meant
dream dreamt dreamt
leap leapt leapt
creep crept crept
keep kept kept
deal dealt dealt
feel felt felt
kneel knelt knelt
第四种，动词形式不变化。这些词的尾字母都是 d或t。
bet bet bet read read read
burst burst burst rid ridded, rid ridded, rid
cast cast cast set set set
cost cost cost shed shed shed
cut cut cut shred shredded, shred shredded, shred
hit hit hit slit slit slit
hurt hurt hurt split split split
knit knitted, knit knitted, knit spread spread spread
let let let sweat sweat, sweated sweat, sweated
put put put thrust thrust thrust
quit quitted, quit quitted, quit wed wedded, wed wedded, wed
第五种，词的尾字母中的 -ve替换为 -ft。
bereave bereft, bereaved bereft, bereaved
cleave cleft, clove cleft, cloven
leave left left
我们知道knife的复数是knives。这是辅音通转中的 v与f的通转。
第六种，过去式和过去分词变为 -ght形。
buy bought bought
bring brought brought
catch caught caught think thought thought
seek sought sought
teach taught taught
bring->brought, think->thought, 过去式中n音省略，词尾加t； 而h=k=g 是同为c类音，辅音通转，所以g和h能放一块。seek和teach，k=ch=g 都是c类音，辅音通转，过去式中变为g并加t。catch 中tch发/ch/音，属于c类音。
第七种，杂项。
have, has had had make made made
lay laid laid stand stood stood
say said said
has 到 had, s—d, d类音通转。lay, say, 半元音y 元音互换为i, 加d成为过去式。make 到 made 比较特殊(我想make 应源于machine, 而ch和d同音系，故而相转)。stand 变为 stood, n音省略。
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