PaulaJo

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seen Mar 31 '12 at 17:40
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Mar
31
awarded  Teacher
Mar
31
comment Which tense to use in this situation?
The sentence "I have been developing a computer program since 2009" is grammatically accurate, as the others have commented, but that puts the point of reference at the present, and as far as I understand your question, your summary just refers to what you did in 2011. In this case, the verb "continue" is the best choice.
Mar
31
comment Which tense to use in this situation?
If you say that you "continued" working on the program, two things are clear: (1) that you started working on the program before 2011 and (2) that you didn't finish the program in 2011.
Mar
31
answered Which tense to use in this situation?