La neta que no se pero trataré.
No hay nadie en la clase.
You should not put "alguien" because that means somebody.
Eduardo was a happy person, he always helped people, there was one problem about him, he was alergic to peanuts. One day somebody invited Eduardo to a party, he was exicted, he got ready, and went, at the party there was many people, there was also many snacks and food. Eduardo knew he was alergic to peanuts, he got a brownie. Later on that night, Eduardo started to feel weird, his cheeks started to grow, and he could not breathe, the people at the part immedianly called 911, he went to the hospital and he had to get surgery immideantly, it turns out that the brownie had peanuts in it, Eduardo did not know about it. The surgery went out well, and the doctors told him to be more careful.
Answer:
Tu estudiaste por tres meses.
Tu estudiaste durante tres meses.
Explanation:
Both are corrects. Hope it helps.
