Subject + Has/Have + been + Verb (Ist form) + Ing + Object
+ For/Since + Time + .
''has been / have been‘has been / have been‘
''Ing' Ing'
''Since Since For' For' ''Since' Since' ''For' For'
Use of 'For' and 'Since'
"For" is applied before uncertain
time:-
"Since" is applied before certain
time:-
Five hours, two hours, an hourFive hours, two hours, an hour3 O'clock, 10 O'clock, 5 PM, 4 AM.
few days, four days, seven daysfew days, four days, seven daysMonday, Saturday, Sunday
two months, eight monthstwo months, eight months March, June, December
One year, ten yearsOne year, ten years 2011, 2012, 2013
for a long timefor a long time Since long.
Yesterday, tomorrow, day after
tomorrow
Morning, Evening, Night, Noon,
Afternoon.
Birth, beginning, then, when