Student or Learner
I want to say that I have studied the most important theories which appeared from 1980-2010. If I say:
I have studied the most important theories from the 1980s. - does it mean that I have studied theories only from 1980-1989 or theories after 1989 are also included?
Is there any difference if I put 'on' at the end:
I have studied the most important theories from the 1980s on.?
I feel that your answer is a bit ambiguous. By saying from the 1980s on/onwards, you are suggesting that it could possibly be from 1985 onwards or any one of the years in the decade. If you say from 1980 onwards, there is no possibility of the year being misunderstood.
However, I am not a teacher and just might be wrong.
And what if I am studying theories from 1982, 86, 92, 98, 2006, 2007 ... and it is not that important that the first of these came out in 82 or whatever. I just want to say that I am studying theories which appeared in the 1980s and the 1990s and after.
Thank you very much Bhaisahab.