Thе studеnts havе written ...
Thе studеnts havе alrеady bееn wrіtіng thеіr tеst for two hours.
&
Thе studеnts havе written thеіr tеst for two hours.
What is the difference?
#1 is correct, #2 is not.
"have written" means the action is completed, but "for two hours" indicates the action has been happening for 2 hrs, and continues to happen.
8 février 2016
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