Reflexive verbs are often used in Romance languages with verbs of daily hygiene (to bathe, to get dressed, to shower, to brush your hair), verbs of change of status (to get married, to get divorced, to become), and to reinforce a verb (ir os to go, but irse to to "take off")
With these verbs you have to use a reflexive pronoun, so when you say "me lavo la cara" literally you are saying "I wash myself the face". If you wash your car or wash your dog, it is not a reflexive verb so you would just conjugate lavar appropriately. EX Lavo el perro or mi hermano lava su coche
This is how you use the pronouns. First add the reflexive pronoun, and then conjugate the verb as you would conjugate any verb .
Here is a slide show practice that should help you to understand how to use the reflexive verbs.
bañarse - to bathe - en el presente
I bathe, I am bathing, I do bathe
{yo} me baño...................... {nosotros} nos bañamos
{tu} te bañas....................... {vosotros} os bañaís
{el/ella/usted} se baña......... {ellos/ellas/ustedes} se bañan
VERBOS REFLEXIVOS
bañarse - to bathe
cepillarse - to brush
peinarse - to comb
lavarse - to wash
ducharse - to shower
maquillarse - to make up
despertarse - to wake up (e - ie)
acostarse - to lie down,go to bed (o - ue
levantarse - to stand up
ponerse - to put on (me pongo)
quitarse - to take off
secarse - to dry off
afeitarse - to shave
acostarse - to go to bed
Me acuesto nos acostamos
te acuestas os acostáis
se acuesta se acuestan