titter 过去式:tittered 过去分词:tittered 现在进行时:tittering 词形变化: 副词: titteringly | 名词: titterer | 动词过去式: tittered | 动词过去分词: tittered | 动词现在分词: tittering | 动词第三人称单数: titters | 词义辨析: 同义参见: laughter giggle laugh chuckle footle