>>>>>>PS "in all the years I've been present here" I'm sure you appreciate the English lesson :-)
>>>>>
>>>>>Are these the type of mistakes that only non-native writers make?
>>>>
>>>>Yes, typical is in the profiles:
>>>>
>>>>"So-and-so has been developing blah since 20 years" (esp francophones as "depuis" is teh word they'd use here.
>>>>
>>>>"So-and-so has been developing blah for 20 years" is correct
>>>>
>>>>We'd say "since" when referring to a particular date or event:
>>>>
>>>>"We've been talkin' about Jackson ever since the fire went out"
>>>
>>>I assume this is okay: "So-and-so has been developing blah since that day, 20 years ago."
>>
>>Yes, that's fine. But a bit dramatic! Like "He was run over by a truck and he's limped ever since that fateful day"
>>
>>Your above sentence is like "since the day he got Jesus" :-)
>
>Yes, well, of course it was a dramatic day afterall. When starting blah he thought it would take some months. And 20 years later he was still busy with the last 2 percent.

lol. Ain't it the truth!?