Verbs in infinite form in spanish always end in -ar, -er, or -ir. In your example: bailar (to dance), escribir (to write), and correr (to run).
<span>To talk about activities or events that have just happened, what phrase do we use in Spanish? </span>In spanish we say "acabo de" to explain something that just happened, like "I have just..." The conjugation is: Ella acaba Nosotros acabamos Yo acabo Él acaba Tú acabas