初中英语时态的标志词都有什么,帮忙多写一些,谢谢答:过去完成时:by the year xxxx,since, before, after, when, as soon as,till, by 现在完成时:already(肯定), yet(否定,疑问), just, before, recently,still, lately,never,ever, never, twice, on several occasion,in the past few days/weeks/months/years,(up to)these few days/...