原形——过去式
be,am ,is -was
are-were
begin-began
break-kroke
bring-brought
build-built
buy-bought
can-could
catch-caught
come-came
do-did
draw-drew
drink-drank
drive-drove
eat-ate
fall-fell
feed-fed
feel-felt
find-found
fly-flew
forght-forgot
get-got
go-went
have,has-had
hear-heard
hold-held
keep-kept
knoe-knew
learn-learnt,learned
leave-left
let-let
make-made
may-might
mean-meant
meet-met
must-must
put-put
read-read
ride-rode
ring-rang
run-ran
say-said
see-saw
sell-sold
shall-should
shoe-shoeed
sing-sang
sit-
sat
sleep-slept
speak-spoke
stand-stood
swim-swam
take-took
teach-taught
tell-told
think-thought
throw-threw
understand-understood
will-would
write-wrote