That is correct but is that your question??
Answer:
Zacarías, Sebastián and Jacobo talk
on the phone with his friend Cristián.
They say, "Christian, what time is the
party?
Cristián says, -The party is at seven
(7). Let's go to the party!
At seven, Cristián, Zacarías,
Sebastián and Jacobo go to the park.
Cristian is not wrongl IThe party
It's at seven o'clock The friends go to the party
and they talk to a lot of girls. They
very happy.
yes you would because it means i talked
Alli esta is grammatically correct. It is correct because alli esta means "there is" and in your example, There is the first floor, sounds better. The first floor is there doesn't sound correct to me. Hope this helps.