Question 1

How does volviste a apretar translate to "did you tighten... again"?

Accepted Answer

This uses the formula volver a + infinitive, which is the most natural way in Spanish to say you did something "again." You conjugate volver (to return) to match the person doing the action—in this case, volviste (you returned)—and follow it with a and the infinitive verb apretar (to tighten).

Question 2

Could I just say ¿Por qué apretaste ese tornillo otra vez? instead?

Accepted Answer

Yes, you absolutely can! Using otra vez or de nuevo (both meaning "again") is perfectly fine and means the exact same thing. However, native speakers use volver a + infinitive constantly, so it is a very important structure to master.

Question 3

I remember apretar being a stem-changing verb. Why isn't it spelled "aprietar" here?

Accepted Answer

You are right that apretar (to tighten/squeeze) has an e to ie stem change when conjugated (for example, "I tighten" is yo aprieto). However, stem changes never happen in the infinitive (the dictionary form ending in -ar, -er, or -ir). Since the volver a structure requires an infinitive, apretar stays exactly as it is.

Question 4

Does the adjective oxidado come from a verb?

Accepted Answer

Yes, it is the past participle of the verb oxidar (to oxidize or to rust). Just like in English, Spanish frequently uses past participles as adjectives. Because it modifies ese tornillo (a masculine, singular noun), it ends in -o to mean "rusted" or "rusty".

¿Por qué volviste a apretar ese tornillo oxidado?

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