八年级下时态总结1. 过去进行时 助动词: _ 肯定句: _ 否定句: _ 一般疑问句: _ 放句首例如: 昨天8点我正在做作业._ 当他回到家时我正在听音乐._was / werewas / were + doingwasnt / werent + doingwas / wereI was doing homework at 8 yesterday. I was listening to music when he came home. 2. 现在完成时 助动词: _ 肯定句: _ 否定句: _ 一般疑问句: _ 放句首例如: 他已经完成工作._ 我还没吃午饭._have/ hashave / has + 动词过去分词have / hasHe has finished the work already. I havent had lunch yet. havent / hasnt + 动词过去分词语法要点 1 现在完成时： 构成：have/has + 动词的过去分词常用的时间状语有：for + 一段的时间, since + 表示起点的时间 _ two days _ 20 years
