Breakdown of Se les aplastó la caja porque estaba muy pesada.
estar
to be (location/state)
muy
very
porque
because
la caja
box
les
to them / to you all
pesado
heavy
se
(marker of an accidental/unintentional event)
aplastar
to crush
Questions & Answers about Se les aplastó la caja porque estaba muy pesada.
Why does this sentence use Se les aplastó instead of just saying they crushed the box?
This uses the accidental se construction to show that an action was unintentional or out of someone's control. Instead of saying they crushed the box (which sounds like they did it on purpose), the Spanish structure translates literally to "the box crushed itself to them." The word se indicates the accident, les tells us who was affected by it, and the verb aplastó is conjugated to match the box.
Why is the verb aplastó singular if les refers to "them" (plural)?
In the accidental se construction, the verb doesn't agree with the people affected by the accident. It agrees with the object that the accident happened to. Here, the grammatical subject is la caja (a single box), so the verb is the singular aplastó. If several boxes had gotten crushed, the verb would become plural: Se les aplastaron las cajas.
Why do we use estaba instead of era for "it was very heavy"? Isn't weight a permanent characteristic?
You can use both, but they give slightly different impressions. Using ser (era muy pesada) describes the box's general, objective nature. Using estar (estaba muy pesada), as we do here, focuses on how the box felt in that specific moment when it was being handled. It emphasizes the condition or burden they were dealing with right when the accident happened.
Does aplastar only mean "to crush"?
Yes, aplastar generally means to crush, smash, squish, or flatten. You will often see it used for things that get squished by physical weight or pressure, like an accidentally stepped-on bug, a ruined package, or even intentionally flattened food like mashed potatoes (papas aplastadas).
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