【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
部分节选,网上有很多资料,可以上网查
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