动词过去式和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askaskedworkworked2以不发音的e结尾，只加d，如lovelovedda
ceda
ced3以辅音字母加y结尾，把y变为i，再加ed，如trytriedstudystudied4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clapshoptripchatbegdropfithugpla
patregretco
trol
注：A以l结尾的动词，尾音节重读时，双写l，如co
trolco
trolled；尾音节不重读时，双不双写都可以，如traveltraveled美travelled英。
B读音与说明①ed在清辅音音素后发音为thelpedlikedfi
ishedfetchedstoppedclapped②ed在浊辅音和元音后发音为dbelievedcha
gedpla
edpreferredfollowedstayed③ed在t、d后发音为idwa
ted
eededadmittedpermitted
二不规则变化
英语中有些动词的过去式和过去分词形式变化不规则，可主要分为几种情况。
【AAA型】：
putputput
cutcutcut
shutshutshut
setsetset
hithithit
hurthurthurt
costcostcost★readridreadredreadredletletlet
burstburstburst（
v爆发，突发；爆炸）
castcastcast（v1投掷抛扔撒2投射光、影、视线等ato
3脱落蜕皮丢）
ridridrid（vt使摆脱；使去掉）spreadspreadspread
【ABB型】：
f原形→aughtought→aughtoughtcatchcaughtcaughtteachtaughttaught
bri
gbroughtbrought
buyboughtbought
thi
kthoughtthought
【原形→元音变化→元音变化】
sitsatsat
meetmetmet
fi
dfou
dfou
d
getgotgot
sta
dstoodstoodu
dersta
du
derstoodu
derstood
wi
wo
wo
holdheldheld
shi
esho
esho
e
digdugdug
ha
ghu
gha
gedhu
gha
ged
【原形→“…t”→“…t”】
loselostlost
buildbuiltbuilt
spillspiltspilt
spoil
spoiltspoilt
se
dse
tse
tspe
dspe
tspe
tsmellsmeltsmeltfeelfeltfelt
mea
mea
tmea
tlear
lear
tlear
edlear
tlear
edle
dle
tle
t
【原形→“…d”→“…d”】
hearheardheardmakemademadehavehashadhadpaypaidpaidsay
saidsaidlaylaidlaidsellsoldsold
telltoldtold
【“eeea”→“et”→“et”】
sleepsleptsleptsweepsweptsweptkeepkeptkeptleaveleftleft
【ABC型】：
【原形→变形→原形e
e】beamiswasbee
bearewerebee
seesawsee
dodiddo
egowe
tgo
ebeatbeatbeate
eatateeate
givegavegive
hidehidhidde
fallfellfalle
mistakemistookmistake
taketooktake
drivedrovedrive
riseroserise
rideroderidde
writewrotewritte

【原形→r