I have a question about the present perfect.
A: Have you seen Jane this morning? (said in the morning)
B: Yes, I have. I saw her an hour ago.
Here, does "this morning" mean "from the early morning until the present when speaker A was talking?
I have a question about the present perfect.
A: Have you seen Jane this morning? (said in the morning)
B: Yes, I have. I saw her an hour ago.
Here, does "this morning" mean "from the early morning until the present when speaker A was talking?
Yes, "this morning" means any time from very early morning to the moment of saying it (the present).
In your expression B, you have contracted "Yes, I have." to "Yes, I've". That contraction can't be made unless the auxiliary verb "have" is followed explicitly by a main verb, as in "Yes, I've seen her.".