最新外研版英语九年级下册Module5 Unit3
现在完成时用法: 1、发生在过去的动作且对现在仍有影
响的动 作，强调对现在的影响. 2、从过去一直延续到现在的动作 常用时间状语：already, just, never, before, recently, in the past few years, ever, so far, since+过去的点时间, for+段时间 结构：have / has+过去分词(--ed) have / has worked 否定构成：have / has not+过去分词