【AAA型】：
cost cost cost
cut cut cut
put put put
read read read
set set set
shut shut shut
hit hit hit
hurt hurt hurt
let let let
【ABB型】：
(原形→aught/ought→aught/ought)
*catch caught caught
*teach taught taught
bring brought brought
buy bought bought
think thought thought
(原形→元音变化→元音变化)
sit sat sat
meet met met
find found found
get got got
stand stood stood
understand understood understood
win won won
hold held held
shine shone shone
dig dug dug
hang hung/hanged hung/hanged
(原形→ “…t” → “…t”)
lose lost lost
build built built
spill spilt spilt
spoil spoilt spoilt
send sent sent
spend spent spent
smell smelt smelt
feel felt felt
mean meant meant
learn learnt/learned learnt/learned
lend lent lent
