riddle 名词复数:riddles 过去式:riddled 过去分词:riddled 现在进行时:riddling 词形变化: 名词: riddler | 动词过去式: riddled | 动词过去分词: riddled | 动词现在分词: riddling | 动词第三人称单数: riddles | 词义辨析: 同义: n.谜; 难题 puzzle enigma conundrum