不规则动词是指英语中那些在从原形转变为过去式和过去分词时，不遵循常规的“-ed”加词尾的变化规则的动词。这些动词的变化通常依赖于其本身的语音变化，特别是元音的变化，而不是通过添加“-ed”来形成新的词形。以下是一些不规则动词的例子：
AAA型：
原形、过去式和过去分词都相同。
cost
cut
hit
hurt
let
put
read
AAB型：
原形与过去式相同。
beat
ABA型：
原形、过去式和过去分词都不同。
become
begin
break
bring
buy
choose
come
do
drink
drive
eat
fall
feel
find
fly
forget
freeze
get
give
go
grow
have
hear
hide
hit
hold
keep
know
leave
lend
let
lie
lose
make
pay
put
read
ride
ring
run
say
see
sell
send
show
shut
sing
sit
sleep
speak
spend
stand
take
teach
tell
think
throw
understand
wear
win
write
ABB型：
原形、过去式和过去分词都不同，但有一定的规律。
bring
buy
choose
come
do
drink
drive
eat
fall
feel
find
fly
forget
freeze
get
give
go
grow
have
hear
hide
hit
hold
keep
know
leave
lend
let
lie
lose
make
pay
put
read
ride
ring
run
say
see
sell
send
show
shut
sing
sit
sleep
speak
spend
stand
take
teach
tell
think
throw
understand
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