I'd like your opinion on this added input. You are The Parser.
***** NOT A TEACHER *****
(1) Yes, I am The Parser. And I am a very bad parser.
(2) I think that ratoncolorao in post #3 hit the nail on the head.
The famous Professor Quirk in his equally famous
A Comprehensive
Grammar of the English Language seems to agree with ratoncolorao.
He says that
during usually refers "to a point or period within
duration rather than duration itself."
If I understand that correctly, that means that a sentence such as
"The city has changed during the last 10 years" means that maybe
it changed during the sixth year and since then there has been
stability (no big changes).
(3) Then, as ratoncolorao said, Professor Quirk says that
over has
a durational meaning. I think that ratoncolorao explained it better
when saying that it refers to change that covers the whole time period.
The professor says that
over "generally refers to a shorter period of time
than
through(out)." I guess that some teachers would prefer: "The city
has changed throughout these last 10 years." Then the professor adds:
"Expressions like
over the last three years seem to have become
increasingly common."
(4) I think that ratoncolorao's great analysis is just another example of
English learners who understand grammar (and vocabulary) better than many
of us native speakers.
James