Learn Spanish (Latin America): A ellos les gusta el queso, pero a mí no.

Yes, it kind of is! In Spanish, verbs like gustar require an indirect object pronoun—in this case, les (to them). The A ellos part is technically optional, but it is added for clarity or emphasis. Without A ellos, les gusta could mean "they like it" or "you all like it." Here, it is used to emphasize the contrast: They like cheese, but I do not.

Since "they" (ellos) is plural, why is the verb gusta singular instead of gustan?

Because with gustar, the person doing the liking isn't the subject of the sentence—the thing being liked is! Literally, this sentence means "Cheese is pleasing to them." Since the subject is el queso (cheese), which is a singular noun, we use the singular verb gusta.

Why is it el queso instead of just queso? In English we just say "they like cheese."

In Spanish, when you talk about a noun in a general, all-encompassing sense (like cheese in general), you must use a definite article (el, la, los, or las). Since "cheese" is the subject of the verb gusta, you have to include the el.

How does a mí no mean "but I do not"? Where is the word for "I" ()?