Question

When do you use the expression a la?

Answer 1

Answer:

Okay so a la is the feminine form of the definite article.

So when your gonna going somewhere  and the place is femine you use it.

for example: Yo voy A LA casa de mi amigo

your going to the house off your friend house (casa) is femine,  

another example:¿ tu vas a ir a la fiesta ?

your going to party?

a la means to but in femine

a el is masculine

Explanation:

Answer 2

You use "al" (a contraction of a + el) when you are taking about a masculine noun and "a la" when you are talking about a feminine noun. Good luck!! :))