Final answer:
The sentence "Quiero comer mi manzana en el patio" is grammatically correct in Spanish.
Step-by-step explanation:
The sentence, "Quiero comer mi manzana en el patio," is grammatically correct. The subject of the sentence is "Quiero," which means "I want" in English. The verb "comer" means "to eat" and it is conjugated to match the subject. The rest of the sentence includes the direct object "mi manzana" (my apple) and the prepositional phrase "en el patio" (in the yard).
Learn more about Spanish sentence structure