精选优质文档-倾情为你奉上现在完成时 一，基本结构：主语+have/has +p.p（过去分词） 过去分词：规则动词的过去分词构成与动词过去式相同；不规则动词需要特殊记忆。I have taught English in this school since 1999.二，句式变化： 肯定句：主语+ have/ has +过去分词+其它 My home town has changed a lot over the years. 近几年家乡变化很大。否定句：主语+ have/ has+ not +过去分词+其它I havent heard from her these days. 这些日子我没有收到她的信。疑问句：Have/ Has +主语+过去分词+其它Have you ever eaten fish and chips?肯定回答：Yes, 主语+ have/has. 否定回答：No, 主语+ have/has not/.Have you finished your work?
