问题描述: 还是没说清楚什么是肯定式? 1个回答 分类:英语 2014-09-18 问题解答: 我来补答 就是在肯定句中使用的,如He was born. He died .I bought it yesterday.可用过去时,但不能和一段时间连用.如.He has died years . 展开全文阅读