How do I use reír/reírse? When I look up the word "laugh" in Spanish, sometimes it says "reír" and sometimes it says "reírse." I understand "reírse" is reflexive, but is there ever a time when I would use just "reír" without a reflexive pronoun? Also, when I look up "laugh at" sometimes it uses "de" and sometimes it uses "con." Are both correct? Thanks for helping!

When do you use Eso and Aquello? I was taught that the words for "that" are ese/esa or aquel/aquella, but I've seen a lot of sentences using eso and aquello. What is the difference and when do you use each one?