Uso do present perfect

Tempo verbal composto pelo auxiliar have (ou has) + verbo no particípio. Não se junta a outro auxiliar na mesma oração.

Present Perfect x Simple past
I have written two books.
I wrote two books last year.

Present Perfect x Simple Present
I am a teacher. I live in Botafogo.
I have been a teacher for almost 6 years.
I have lived in Botafogo since I was born.

3 - Palavras chave
Ações raras - win the lottery, travel by ship...
Have you ever traveled by ship ?
Yes, I have already traveled by ship.
No, I have never traveled by ship.

Ações comuns - brush my teeth, read the newspaper...
Have you brushed your teeth yet ?
Yes, I have already brushed my teeth.
No, I haven't brushed my teeth yet