问题描述: buy,do,have,see,open,air,ask,put,go,be的过去式和过去分词 1个回答 分类:英语 2014-10-11 问题解答: 我来补答 uy bought boughtdo did donehave had hadsee saw seenopen opened openedair aired airedask asked askedput put putgo went gonebe was/were been 展开全文阅读