PRESENT PERFECT ... PAST SIMPLE...

Conversations often start in the present perfect (non specific) then the Past Simple (specific)

have you seen Giovanni Maria?

yes I have (seen ) / no I haven't  (seen)

when did you see him ?

I saw him yesterday

have you done your homework ?

yes I have

when (did you do it)?

I did it two hours ago

-have you ever (mai) visited Paris ? yes I have -when? yes, I visited Paris / it (Lo) 3 years ago.

PAST SIMPLE

aff. I visited Rome yesterday. neg. I did not visit Rome yesterday. int. did you visit Rome yesterday?

risp' corta -  yes I did /  no I didn't

alcuni negativi -

I didn't see you last week, where were you? We didn't order any pizza because we weren't hungry. They didn't know that the exam was yesterday. The poor cat didn't hear the car, so the car hit it. What a pity! Now it's dead. You didn't remember our anniversary last year, so be very careful this year!

They didn't fail their exam because they were very good students.

he didn't see the letter because he wasn't attentive enough.

con essere si conjuga, mentre gli altri prendono DID (interrog') DIDN'T / DID  NOT  (negat'). c'é anche un   'interrogativo negativo' es. 'didn't you phone the hospital to book your operation?' non hai chiamato...?

didn't you see the sign? non hai visto la segnale?

why didn't you tell me? - perché non mi hai detto.