We use Reflexive verbs when someone performs an action to or for himself/herself. In other words, the subject of the verb and the direct object of the verb are the same person.This verb is always accompanied by a Reflexive Pronoun. These pronouns are indicated in the Table below. Therefore:
1. Margarita se lava el pelo con el champú.
First answer: se
Second answer: lava
Margarita can be replaced by ella, that is the third-person singular (feminine form). So, se is the direct object pronoun for the third-person singular. Lava, accompanying this pronoun, is a conjugation of the verb lavar. So this sentence means:
Margarita washes her hair with the shampoo.
2. Ricardo y Teresita se miran en el espejo.
First answer: se
Second answer: miran
Ricardo y Teresita can be replaced by ellos, that is the third-person plural. So, se is the direct object pronoun for the third-person plural. Miran, accompanying this pronoun, is a conjugation of the verb Mirar. So this sentence means:
Ricardo and Teresita look in the mirror.
3. Yo uso “Crest” cuando yo me cepillo los dientes.
First answer: me
Second answer: cepillo
me is the direct object pronoun for the first-person singular. Cepillo, accompanying the pronoun, is a conjugation of the verb cepillar. So this sentence means:
I use "Crest" when brushing my teeth.
4. Tú te lavas en el lavabo.
First answer: te
Second answer: lavas
te is the direct object pronoun for the second-person singular. Lavas, accompanying the pronoun, is a conjugation of the verb lavar. So this sentence means:
You wash in the sink.
5. Ustedes no se afeitan por la mañana.
First answer: se
Second answer: afeitan
Se also matches the second-person plural (ustedes - you plural). Afeitan, accompanying this pronoun, is a conjugation of the verb afeitar. So this sentence means:
You do not shave in the morning.
6. Sara se maquilla con el polvo de cara.
First answer: se
Second answer: maquilla
Sara can be replaced by ella, that is third-person singular (feminine form). So, se is the direct object pronoun for the third-person singular. Maquilla, accompanying this pronoun, is a conjugation of the verb maquillar. So this sentence means:
Sara puts on makeup with make-up powders.
7. Tú no te cepillas el pelo por la noche
First answer: te
Second answer: cepillas
As in 4, here we use the direct object te. Cepillas, accompanying the pronoun, is a conjugation of the verb cepillar. So this sentence means:
You do not brush your hair at night
8. Ustedes no se cepillan a las diez de la noche
First answer: se
Second answer: cepillan
As in 5, here we use the direct object se matching the second-person plural. Cepillan, accompanying the pronoun, is a conjugation of the verb cepillar. So this sentence means:
You do not brush at ten o'clock at night
9. Ana y yo nos miramos en el espejo.
First answer: nos
Second answer: miramos
Ana y yo can be replaced by nosotros, that is the first-person plural. So, nos is the direct object pronoun for the first-person plural. Miramos, accompanying this pronoun,is a conjugation of the verb mirar. So this sentence means:
Ana and I look in the mirror.
10. Tú siempre te pintas la cara todos los días.
First answer: te
Second answer: pintas
te is the direct object pronoun for the second-person singular. Pintas is a conjugation of the verb pintar that accompanies this pronoun. So this sentence means:
You always paint your face every day.