Réponse :
Bonjour,
1/ I don’t know your son. I have never seen him.
2/ We can afford to buy whatever we want now. We have won the jackpot.
3/ Can you repair my calculator? I have just broken it.
4/ I can’t show you her letter. I have thrown it away.
5/ They got engaged two weeks ago and he has already asked her to marry him.
6/ She passed her exam last year.
présent perfect ( have/has + participe passé )
prétérit / simple past ( action passée/ datée... )