Breakdown of De limpiar el torno, se apagará el motor primero.
limpiar
to clean
primero
first
se
(impersonal) one / passive marker
apagar
to turn off
el motor
the engine
de
if (+ infinitive)
el torno
the lathe
Questions & Answers about De limpiar el torno, se apagará el motor primero.
Why does this sentence use de limpiar instead of si se limpia for 'If cleaning'?
Using de followed by an infinitive is a structural alternative to form an 'if' condition. It means exactly the same thing as si plus a conjugated verb, but it sounds more formal or technical, making it perfect for manuals, safety instructions, or rules.
Why do we need the se in se apagará?
This is the passive se. Since a machine cannot turn itself off, se apagará el motor translates to the passive voice 'the motor will be turned off.' This structure is very common in Spanish instructions because it focuses on the action and the object rather than who is doing it.
Could we say de haber limpiado instead of de limpiar in this sentence?
Not here, because de haber limpiado is the perfect infinitive and means 'If [someone] had cleaned.' That structure is used for hypothetical or impossible past conditions. Since this sentence gives a future instruction based on a potential action, we need the simple infinitive de limpiar.
How does the subject work here, since el motor doesn't clean the lathe?
Grammatically, the subject of apagará is el motor. However, because it is a passive se construction, the implied human actor (the person turning off the motor) is the same person who would be cleaning the lathe. Spanish comfortably allows de + infinitive in these impersonal instructions as long as the logical, underlying actor is the same.
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