Verbs ending in -ir that undergo stem changes in the present tense also under go stem changes in the preterite. These verbs have a stem change in the second person formal singular (usted), third person singular (él, ella) and third and second person plural (ellos, ellas and ustedes) forms.
The only thing i would change is the word “ir” into the word “vaya.” it’s grammatically correct. besides that you did a fantastic job!
<span>1. Jaime se levanta a las ocho.
<em>Jaime gets up at eight.</em>
2. Yo uso Crest cuando yo me cepillo los dientes.
<em>I use Crest when I brush my teeth.</em>
3. Ustedes no se afeitan por la manana.
<em>You don't shave in the morning.</em>
4. Marcos no se seca el pelo después de ducharse.
<em>Marcos does not dry his hair after showering.</em>
5. Tú te lavas las manos con el jabón
<em>You wash your hands with soap.</em>
6. Ricardo y Teresita se miran en el espejo.
<em>Ricardo and Teresita look in the mirror.</em>
7. Nosotros nos cepillamos el pelo con el cepillo.
<em>We brush our hair with the brush.</em>
8. Ustedes se lavan en el lavabo.
<em>You wash in the sink.</em>
9. Ustedes no se cepillan a las diez de la noche.
<em>You do not brush at ten o'clock at night.</em>
</span>
