分别是：played,played,fixed,fixed,succeeded,succeeded,announced,announced,refused,refused,changed,changed,stopped,stopped,chatted,chatted,chopped,chopped.
求动词的过去式和过去分词play,fix,succeed,announce,refuse,change,stop,cha
分别是：played,played,fixed,fixed,succeeded,succeeded,announced,announced,refused,refused,changed,changed,stopped,stopped,chatted,chatted,chopped,chopped.