pack,repain,try,answer,smile,muss,retire,move,believe的过去式与过去分词

pack packed packed
repain repained repained
try tried tried
answer answered answered
smile smiled smiled
muss mussed mussed
retire retired retired
move moved moved
believe believed believed
以下是一些有关语法，希望对你有帮助。
一、一般情况下，动词词尾加 -ed ，如： worked played wanted acted
二、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
三、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
四、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
其他是一些不规则的。参考资料中有张表，可以去看看。

过去式 过去分词pack packed packedrepaint repainted repaintedtry tried triedanswer answered answeredsmile smiled smiledmuss mussed mussedretire retired retiredmove moved moved believe believed believed...