You’ll want to specify who is personally doing the action (who is speaking?), who is the action being directed towards (who to?), and what things belongs to who (whose words?).
When you refer to “your foot,” you would use a singular tu pie. When you refer to “your feet,” you would use the plural, tus pies. wher appropriate, masculine and feminine pronouns apply.
Yo – I
Él /ella – he/she
Ellos, ellas – they
Nosotros – we
Tú – you (informal)
Usted – you (formal)
Me – (to) me
Te – (to) you
Le – (to) him, her, you
Les – (to) them
Nos – (to) us, ourselves
Mi(s) – my
Tu(s) – your
Su(s) – her, his, yours (formal)
Nuestro(s), nuestra(s) – our(s)
