一般情况下,动词词尾加 -ed ,如： worked played
wanted
acted
以不发音的 e 结尾动词,动词词尾加 d,如：
lived
moved
decided
declined
hoped
judged
raised
wiped
以辅音字母 + y结尾的动词,把-y变为-i 再加-ed,如：
studied
tried
copied
justified
cried
carried
embodied
emptied
以一个辅音字母结尾的重读闭音节动词,双写词尾辅音字母,再加 -ed,如：
stopped
begged
fretted
dragged
dropped
planned
dotted
dripped
注：不规则动词的过去式变化规律性不强,须多加记忆, 如:
go - went
make - made
get - got
buy - bought
come - came
fly-flew
