you just take out the N so canta
"<span>el perro" is "the dog"
as used in "</span>My dog is a German Shepherd" --- "<span>Mi perro es un pastor alemán."
credits to </span>http://www.spanishdict.com
Its number four but for ur sentence its dos ninos en una computadora
Its spelled like this
Yo iba todos los dias al gimnasio para ser un mejor atleta.
I would to the gym every day to the gym to be a better athlete