Step-by-step explanation:
First, make sure you understand the question and what is being asked. For example, if someone asks "¿Qué quieres hacer?" (What do you want to do?), they are asking for your opinion or plans.
If you do not have an object to answer the question, you can use a direct object pronoun to refer to yourself or the person being addressed. For example, if someone asks "¿Qué quieres hacer?" (What do you want to do?), you can answer "No tengo nada que hacer" (I don't have anything to do).
In Spanish, the direct object pronouns are "me" (referring to the first person), "te" (referring to the second person familiar), "lo" (referring to the third person masculine singular), "la" (referring to the third person feminine singular), "nos" (referring to the first person plural), "os" (referring to the second person plural familiar), and "los" or "las" (referring to the third person plural).
To use a direct object pronoun in a sentence, place it before the verb. For example, "No tengo nada que hacer" (I don't have anything to do) becomes "No me queda nada que hacer" (I don't have anything left to do) using the direct object pronoun "me" to refer to the first person.
Here are some more examples of using direct object pronouns in questions and answers:
"¿Qué quieres comer?" (What do you want to eat?) - "No sé, no tengo hambre" (I don't know, I'm not hungry) - "me" is used to refer to the first person in the answer.
"¿Qué libro estás leyendo?" (What book are you reading?) - "No estoy leyendo ningún libro" (I'm not reading any book) - "estoy" is conjugated to agree with the subject "yo" (I), and "ningún" is used with the masculine singular pronoun "lo" to mean "none" or "no".
"¿Qué quieres comprar?" (What do you want to buy?) - "No quiero comprar nada" (I don't want to buy anything) - "nada" is used with the feminine singular pronoun "la" to mean "nothing".
"¿Qué hicisteis ayer?" (What did you do yesterday?) - "No hicimos nada interesante" (We didn't do anything interesting) - "hicimos" is conjugated
(if you notice alot of "a" ending words in the sentence, it's normally safe to use la, if you see alot of "o" ending words in the sentence, it's normally safe to use lo, like as in "no lo tengo - I don't have it."