upstairs 名词复数:upstairs 词形变化: 名词: upstager | 动词过去式: upstaged | 动词过去分词: upstaged | 动词现在分词: upstaging | 动词第三人称单数: upstages | 同义词: upwards | upstair | 反义词: downstairs | 词义辨析: 同义参见: upwards 反义: a.ad.楼上的; 在楼上 downstairs