Learn Italian: Non abbiamo ancora rinnovato queste zone. - We have not renovated these areas yet.

In two-part past tenses like the passato prossimo, ancora is usually placed right between the helping verb (abbiamo) and the past participle (rinnovato). The sentence literally flows as 'Not we have yet renovated'.

Could I use più instead of ancora here? How would that change the meaning?

Yes! If you swapped them and said Non abbiamo più rinnovato queste zone, it would mean 'We haven't renovated these areas anymore.' Both ancora (yet) and più (anymore) follow the exact same word order rule, slipping right between the two verb parts.

Since queste zone is feminine plural, shouldn't the verb be rinnovate instead of rinnovato?

Good eye, but no! Because the helping verb is avere (abbiamo), the past participle rinnovato stays in its default -o form. We generally only change the ending to match gender and number when the helping verb is essere.

Why is it queste zone and not questi zone?