精品文档---下载后可任意编辑常见时态的标志词(重点现在完成时)★ 一般现在时:do / does (被动:is / am / are done)often, usually, always, sometimes, never, seldom, every week/day/year/month
, once a week, on Sundays★ 一般过去时:did (被动:was / were done)ago, yesterday, the day before yesterday, last week/year/night/month
, in 1989, just now, at the age of five, one day, ago, long ago, once upon a time, then(那时), on that day, in the past★ 现在进行时:is / am /are doing (被动:is / am / are being done)now, at this time, these days, Listen
at this moment/time★ 过去进行时:was / were doing (被动:was / were being done)at this time yesterday,at that time 或"when + 一般过去时从句", at 1:00 last night★ 现在完成时:has / have done (被动:has / have been done)recently (the recent years), already, before, just(刚刚,just now 用一般过去时), ever(曾经), never, (as) yet(迄今为止), lately