1.原形、过去式和过去分词相同的动词（A、A、A型）
cost cost cost
cut cut cut
hit hit hit
hurt hurt hurt
let let let
put put put
read read read
shut shut shut
2.过去式与过去分词相同的动词（A、B、B型）
bring brought brought
build build build
burn burnt，burned burnt，burned
buy bought bought
catch caught caught
dig dug dug
feel felt felt
fight fought fought
find found found
get got got
hang hung.hanged hung.hanged
have,has had had
hear heard heard
hold held held
keep kept kept
learn learnt,learned learnt,learned
leave left left
lend lent lent
lose lost lost
make made made
mean meant meant
meet met met
say said said
sell sold sold
send sent sent
shine shone,shined shone,shined
sit sat sat
sleep slept slept
smell smelt,smelled smelt,smelled
spend spent spent
stand stood stood
sweep swept swept
teach taught taught
tell told told
think thought thought
understand understood understood
win won won
3.过去分词与原形相同的动词（A、B、A型）
become became become
come came come
run ran run
4.过去式与原形相同的动词（A、A、B型）
beat beat beaten
must must —
5.原形、过去式和过去分词都不同的动词（A、B、C型）
be(am,is,are) was,were been
begin began begun
blow blew blown
break broke broken
can could —
choose chose chosen
do did done
draw drew drawn
drink drank drunk
drive drove driven
eat ate eaten
fall fell fallen
fly flew flown
forget forgot forgotten
give gave given
go went gone
grow grew grown
know knew known
lie lay lain
may might —
mistake mistook mistaken
ride rode ridden
ring rang rung
rise rose risen
see saw seen
shall should —
show showed shown
sing sang sung
speak spoke spoken
swim swam swum
take took taken
throw threw thrown
wake woke waken
wear wore worn
will would —
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