第1个回答 2017-07-12
stop stopped stopping
shop shopped shopping
admit---admitted admitting
beg---begged begging
cancel---cancelled cancelling
chat---chatted chatting
dip---dipped dipping
drop---dropped dropping
fit fitted fitting
nod nodded nodding
plan---planned planning
prefer preferred preferring
ship shipped shipping
step stepped stepping本回答被网友采纳