Learn Spanish (Latin America): ¿Vas a la reunión conmigo? - Are you going to the meeting with me?

In Spanish, the preposition con (with) combines with the pronoun mí (me) to form the special one-word exception: conmigo. You will never see con mí.

Where is the word for "Are" in this sentence?

Spanish doesn't use helper words like "do" or "are" to ask questions. You just take the normal statement Vas (You go / You are going) and add question marks to make it ¿Vas? (Are you going?).

How do I know reunión is a feminine word taking la?

Almost all Spanish words that end in -ión (like reunión, canción, or televisión) are feminine, so they use the feminine word for "the" (la).

Why does reunión have an accent mark?

The accent mark shows you exactly where to put the stress when speaking: on the final syllable (re-u-NIÓN). Words ending in 'n' normally stress the second-to-last syllable, so the accent mark is needed here to break that rule.