vodkatini said:
what is the difference between them ??? many thanks
I lived in Boston for a couple of years - simple past.
The simple past is used for past actions that are complete and have no connection with the present. That means I no longer live in Boston, but I did in the past.
I've lived in Boston for a couple of years - present perfect.
The present perfect is used for past actions that have a connection to the present. That means that I still currently live in Boston.
Iain