Andre Muller:
You could consider using {rav} ‘minimum’, as in {rav loS ben} ‘minimum four years ago’, although it might be interpreted as ‘from four years onwards’, i.e. ‘for the last four years’.
I had never thought of using {rav}/{'aqroS} in time stamp constructions. I understand how with regards to the original question, the {rav loS ben} could be interpreted as "from four years onwards’", but that aside, I like the idea of using {rav}/{'aqroS} in time stamp constructions. SuStel:
qaSpa' loS ben before four years ago occurs
I'm slightly confused with this. Shouldn't the {loS ben} as a time stamp be always the first element in a sentence (i.e. without being preceded by a verb) ? Could I indeed say the following ? qaSpa' loS ben, tlhIngan Hol vIghojmoHpu' I started learning klingon more than four years ago ~ Qa'yIn