how to choose the verbal form between have been v-ing and have v-ed with "for " or "since". What the differencen "I have been living in Paris for .... and "I have lived in Paris for ..." I don't know when use this one or the other.
With for and since when you’re talking about how long, you use the have been v-ing form except for non-action verbs (also called state or stative verbs) like know or believe for example. With a few verbs like live or work you can use either the have been v-ing form or the have v-ed form. There is, however, a subtle difference:
If you use the have been v-ing form, you consider the situation to be temporary.
If you use the have v-ed form, you consider the situation to be permanent.