For and Since = adverb of duration
The structure Have+ participle is often used with adverb of duration For and Since
FOR
For is used before a quantity of time- several days: three days, a month
For answers the question, how long?
Majed has been a member for three years
SINCE
Since is used before a specific time- Monday, March, 1999
Majdah has been a member since 2003
Regards
Smile
The structure is taken from how to prepare for the TOEFL test of English as a foreign language with audio compact discs, 11th edition
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معقوله ..!!
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يقول لابرويير : بعضنا ينجح بذكائه، وبعضنا ينجح بغباء الاخرين
يقول شكسبير : الصديق الحقيقي هو الذي يخبرك باسم امه 