A touca é obrigatória no spa, desde que vás à piscina.

Questions & Answers about A touca é obrigatória no spa, desde que vás à piscina.

Why is the verb form vás used instead of vais?
The phrase desde que means "provided that" or "as long as". It sets up a condition and always triggers the subjunctive mood. Since we are talking about a present or future possibility, we use the present subjunctive of ir (to go) for the tu (you) form, which is vás.
I learned chapéu for hat. When do I use touca?
Touca specifically refers to a close-fitting cap without a brim. In a pool or spa context, it means a swimming cap (short for touca de natação). It is also used for shower caps or surgical caps. For a regular hat with a brim, you still use chapéu, and for a winter beanie, you use gorro.
Could I say para a piscina instead of à piscina?
You could, but the preposition a is much more natural here. In Portuguese, going somewhere with a implies a short visit with the intention of returning soon (like going to the pool to swim). Using para usually implies moving somewhere for a longer time. À is just the contraction of the preposition a and the feminine article a.
Why does obrigatória end with an "a" here?
Obrigatória is an adjective meaning "mandatory". It ends in "a" because it must agree in gender with the noun it describes, which is the feminine noun a touca (the cap).

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