,
We use the present perfect when the acctión is in past and continue to the present.
The words of and since is used in the present perfect.


PositiveNegativeQuestion
I / you / we / they I have spoken. I have not spoken. Have I spoken?
he / she / it He has spoken. He has not spoken. Has he spoken?

In the present perfect is used: already, just, yet, and still.

Exceptions in spelling when adding edExample
after a final e only add d love – loved
final consonant after a short, stressed vowel
or l as final consonant after a vowel is doubled
admit – admitted
travel – travelled
final y after a consonant becomes i hurry – hurried