现在完成时的标志词及例句(现在完成时的标志词)

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1、already ,yet , since , so far(到目前为止) up to now(到目前为止) recently. in the past /last years在过去的几年中it is the first/second....time sb +现在完成时如。

2、it is my first time I have been here.already（肯定）, yet（否定。

3、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, this morning/week/month/year, just, up to present, so far,up to now,till now,since+时间。

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