英文单词中,字母双写的情况,如：双写加ing,双写加ed,always confused me.
动词ing形式双写的有：sit,put,get,stop.begin,swim,prefer,travel,run
动词加ed双写的有：stop ,drop ,fit,prefer,travel
begin beginning
cut ---- cutting
dig ---- digging
get ---- getting
hit ---- hitting
let ---- letting
put ---- putting
run ---- running
set ---- setting
shut ---- shutting
sit ---- sitting
spit ---- spitting
split ---- splitting
swim ---- swimming
win ---- winning
beg ---- begged ---- begging
drip ---- dripped ---- dripping
dot ---- dotted ---- dotting
drop ---- dropped ---- dropping
fit ---- fitted ---- fitting
hug ---- hugged ---- hugged
plan ---- planned ---- planning
pat ---- patted ---- patting
rid ---- ridded ---- ridding
rob ---- robbed ---- robbing
rebet ---- rebetted ---- rebetting
regret ---- regretted ---- regretting
stop ---- stopped ---- stopping
stir ---- stirred ---- stirring
rub ---- rubbed ---- rubbing
travel ---- travel(l)ed ---- travel(l)ing
whip ---- whipped ---- whipping
