Mapa mental educación

I can't get in the house. I've lost my keys. Teresa isn't at home. I think she has gone shopping.

for something that happened in the past but is important in the present:

Have you ever met George? Yes, but I've never met his wife.

and we use never for the negative form:

My last birthday was the worst day I have ever had.

We often use the adverb ever to talk about experience up to the present:

I've heared that before.

I've seen that film before.

when we are talking about our experience up to the present:

She has lived in Liverpool all her life.

They've been married for nearly fifty years.

PP

Its for something that started in the past and continues in the present

PRESENT PERFECT