Questions & Answers about Yo voy a la piscina y ella va al mercado.
Why does the sentence use a la before piscina but al before mercado?
This happens because piscina is a feminine word and mercado is masculine. For feminine places, the preposition a (to) and the article la (the) stay separate: a la piscina. But for masculine places, a and el crash together and form the mandatory contraction al: al mercado.
Why do the verbs look so different (voy vs va) if they both mean "to go"?
Are the words yo and ella absolutely necessary here?
Is the word always required when talking about going somewhere?