lesson 名词复数:lessons 过去式:lessoned 过去分词:lessoned 现在进行时:lessoning 词形变化: 动词过去式: lessoned | 动词过去分词: lessoned | 动词现在分词: lessoning | 动词第三人称单数: lessons | 词义辨析: 同义: n.课业; 教学; 学习 teaching instruction assignment exercise course study 同义参见: homework