【原型】-->【过去式】
do ----- did
go ----- went
stay --- stayed
am/is--- was
watch--- watched
see ---- saw
sit----- sat
want---- wanted
help---- helped
take---- took
pass---- passed
shop---- shopped
say----- said
play---- played
visit--- visited
have---- had
are ---- were
cook---- cooked
write--- wrote
look --- looked
listen-- listened
walk---- walked
live --- lived
arrive-- arrived
hope --- hoped
give---- gave
cry ---- cried
clean -- cleaned
study -- studied
practice-practised
ask----- asked
read --- read
enjoy -- enjoyed
like --- liked
rain --- rained
decide-- decided
stop --- stopped
relax -- relaxed
wait --- waited