proffer 过去式:proffered 过去分词:proffered 现在进行时:proffering 名词复数:proffers 词形变化: 名词: profferer | 动词过去式: proffered | 动词过去分词: proffered | 动词现在分词: proffering | 动词第三人称单数: proffers | 词义辨析: 同义参见: invitation proposition propose