Can I use since or for in other tenses?
It
has been the duty free operator of Kolkata since 2008.
My neighbour and I are looking for
duty free operators in Kolkata?
What are the pros and cons of being a mother?
The company has been the duty free operator in Kolkata since 2008.
I have seen many changes in Kolkata since 2008.
Both of these feel right to me. However, there’s something wrong with them. Is generally used with perfect tenses. What is on the other hand used with perfect and simple tenses?
