there have been
is it possible to say something like:
There have been making a lot of improvements in this sphere for last decades.
or
There have done a lot of improvements in this sphere for last decades.
or
There were a lot of improvements in this sphere last decades.
How to say it propertly?
There have been a lot of improvements made in this sphere over the last decades.
or
A lot of improvements have been made in this sphere over the last decades.
28 de julio de 2014
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