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"They did" is a form of "they did", a phrase which is often translated as "hicieron". "Yes" is an interjection which is often translated as "sí". Learn more about the difference between "they did" and "yes" below.
they did()
A phrase is a group of words commonly used together (e.g., once upon a time).
a. hicieron
The kids can play now because they did their chores this morning.Los niños pueden jugar ahora porque hicieron sus tareas esta mañana.
yes()
An adverb is a word that describes a verb, an adjective, or other adverbs (e.g., to run quickly, very tired).
An interjection is a short utterance that expresses emotion, hesitation, or protest (e.g., Wow!).
A noun is a word referring to a person, animal, place, thing, feeling, or idea (e.g., man, dog, house).