My sister is
it means "my sister is the"
Who is the sister of your father? Your aunt, or tía.
"Mi hermana es la" translates to "My sister is the" in English. It is an incomplete phrase and should be followed by a description or comparison.
el lapiz sobre la mesa, es de mi hermana?
It means, My sister's cousin is my....
The sister of my dad is my aunt
'You're welcome' as response to 'thank you': Con mucho gusto, mi hermana. De nada, mi hermana. A la orden, mi hermana. And as greeting to new arrival: Eres bienvenida, mi hermana.
The sister is cruel / unkind and impatient
Translation: The sister of my father is my...
la amiga de mi hermana
Mi hermana lava la ropa
As with many translations, there are many ways that you can say this. The following are just a few: Mi hermana cocina bien. (My sister cooks well) Mi hermana puede cocinar bien. (My sister can cook well) La comida que hace mi hermana es riquísima. (The food that my sister makes is delicious)