问题描述: what ___ you ___(do) yesterday? lucy often___(take)care ot her sister. 1个回答 分类:英语 2014-12-08 问题解答: 我来补答 did do takes 再问: why 再答: yesterday昨天 要用一般过去式 lucy 主语是第三人称单数,谓语动词要三单 展开全文阅读