2、,末尾只有一个辅音字母,双写该辅音字母,再加“ed” stop---stopped---stoppeddrop---dropped--dropped 2.不规则动词 AAA型burstburstbursthurthurthurtletletletcutcutcutcostcostcosthithithitputputputsetsetsetshutshutshutspreadspreadspreadreadreadread(read原形和过去分词发音为/ri:d/,过去式发音为/red/) AA