Réponse :
Bonjour,
1.- (you, watch)Have you ever watched the series Raising Dion?
- No, I (hear)have never heard about it. Is it any good?
- Well, I (see) have already seen three episodes and I think it's pretty good!
2.- I'm telling you Star Trek is the best series I have ever discovered (discover)
I (watch) have never watched a better series... and I (convince) have already convinced all my friends to watch it!
Explications :
PRESENT PERFECT : has / have + past participle
les adverbes " ever / already / never" se placent entre "have/has" et le participe passé.