现在完成时的标志词老师,
问题描述：
现在完成时的标志词
老师,
答
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/weeks/months/years, ...