时间使用 1与现在有关的过去点时间 recently,lately,already,yet,before,still
2与现在有关的频度时间 ever,never,once,twice,three times,several times,
often,seldom,always,time and time again
3与过去有关的现在点时间 just,now,today,tonight,this week,this year
this morning,this afternoon,this evening,
this month,this May,this October,this November
1若想强调动作从何时开始(ever)since
2若想强调动作持续了多久for(a day,several months,many years,how long) for( two hours,six months,quite a long time)
3若想强调整体的时间all (morning,night,day,year,these years,my life)all(the while,these days,these ten days)
4若想强调与过去有关到现在的一段时间up to now,up to the present,till now,until now,so far,in the last few years,in the past 30 years ,these days,these weeks,these years
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