第1个回答 2016-05-28
prefer- preferred
whip-whipped
beg-begged
drip-dripped
dot-dotted
drop-dropped
fit-fitted
hug-hugged
plan-planned
pat-patted
rid-ridded
rob-robbed
rebet-rebetted
regret-regretted
stop-stopped
stir-stirred
rub-rubbed
travel-travel(l)ed本回答被提问者采纳