sag 过去式:sagged 过去分词:sagged 现在进行时:sagging 名词复数:sags 词形变化: 动词过去式: sagged | 动词过去分词: sagged | 动词现在分词: sagging | 动词第三人称单数: sags | 词义辨析: 同义: vi.下垂; 下跌 droop sink hang dangle slump 同义参见: lower1 languish flop flag2