The Rule
The action started in the past and ended in the past = simple past
The action started in the past and still going into the present = present perfect
Examples
- We have talked on the phone every Sunday for the last two years. (Implied: We will talk on the phone again next Sunday.)
- We talked on the phone every night. (Implied: We don’t any more.)
- When I was young, I loved candy. (Implied: I don’t love candy any more.)
- I have always loved candy. (Implied: I still do today.)
- Did you like Star Wars? I don’t know, I have never seen it. (Implied: up until now I have not seen it, but I may see it one day.)
- I didn’t see Star Wars until I was 10. (Implied: but I saw it when I was 10.)
- I haven’t seen Star Wars since I was 10. (Implied: I saw Star Wars when I was 10, but have not seen it again until now.)
- I was fired from my job and I never saw it coming. (Implied: I didn’t see it coming, but now it has happened and it is past.)
- My sister has been to London 5 times. (Implied: She may go to London again.)
- I’ve forgotten my password! (Implied: I cannot open my email today.)
- I forgot my password! (Implied: but now I remember it.)
