Present Perfect I

Auxiliar: HAVE / HAS
Tempo verbal usado para indicar uma ação que ocorreu no passado sem indicação de tempo certo.
Ex. I have copied the activity ( eu copiei a atividade) - sem tempo determinado.

Se houver tempo determinado, usa-se o simple past.
Ex. I copied the activity yesterday. (eu copiei a atividade ontem)

I, you, we, they HAVE
he, she, it HAS

Esse tempo verbal é formado  com o auxilar HAVE ou HAS + participio passado do verbo.

O participio passado pode ser:
Regular: acrescenta-se ED ao verbo, igual ao passado simples. Ex. You have cleaned my home (você limpou minha casa)
Irregular: não ha regra exata. verifique a tabela (clique aqui)

FORMA NEGATIVA:
You have not (haven't) good to school. (você nao foi à escola)
She has (hasn't) broken my computer. (ela não quebrou meu computador)

FORMA INTERROGATIVA:
O auxilar HAVE/HAS vai antes do sujeito (pessoa)
Has he finished the exercise? (ele terminou o exercicio?)
Where have you been? ( onde voce esteve?)

Exemplo:

A canção I Still Haven't Found What I'm Looking For do U2

… I have climbed highest mountains
I have run through the fields
Only to be with you
Only to be with you
I have run
I have crawled
I have scaled these city walls
These city walls
Only to be with you

… But I still haven't found what I'm looking for
But I still haven't found what I'm looking for

… I have kissed honey lips
Felt the healing in her fingertips
It burned like fire
This burning desire

… I have spoke with the tongue of angels
I have held the hand of a devil
It was warm in the night
I was cold as a stone

… But I still haven't found what I'm looking for
But I still haven't found what I'm looking for

… I believe in the kingdom come
Then all the colors will bleed into one
Bleed into one
But yes I'm still running

… You broke the bonds
And you loosed the chains
Carried the cross
Of my shame
Oh my shame
You know I believe it

… But I still haven't found what I'm looking for
But I still haven't found what I'm looking for
But I still haven't found what I'm looking for
But I still haven't found what I'm looking for