present perfect vs. present perfect continuous
present perfect : ( the number of things is the most important ) 1
s + (has/have ) + p.p + number of things done ) 1
e.g. He has played three games
present perfect continuous : it is used to express a duration of an activity in progress
Time is the most imprtant
s + ( has /have) been + V -ing + ( TIME) * 1
e.g. He has been reading for two hours
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