When do you use ''e'' instead of ''y''? when do you use ''u'' instead of ''o''?asap also will mark

You use "e" when it comes before a word that starts with the "i" sound. To see why, try saying "hijos y hijas" quickly. You'll notice that you can't hear the "y" and it sounds like "hijos hijas." Change the "y" to "e" and it's more clear you're saying "hijos e hijas." AND y and o change if they are followed by the same vowel sounds. (basically if the word after y or o has the same sound then the word will change)
E.g ¿Vas a comprar siete cervezas u ocho? "Are you going to buy seven beers or eight?"
E.g Julieta e Ignacio estudian la medicina. "Julieta and Ignacio study medicine."

hope this helps!!

Escondí mis notas would be it

¡claro que si! es el último partido del torneo que ¿estas haciendo tu?