worked [wə:kt]
walked [wɔ:kt]
knocked [nɔkt]
blocked [blɔkt]
backed [bækt]
beaked [bi:kt]
booked [bukt]
dunked [dʌŋkt]
helped [helpt]
swopped [swɔpt]
stopped [stɔpt]
skipped [skipt]
scrapped [skræpt]
shipped [ʃipt]
slipped [slipt]
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还有不少,以清辅音结尾（除t,d外）的词后加ed都发/t/