Question 1

How does de no parar function as an "if" statement here?

Accepted Answer

Using de followed by a simple infinitive is a formal way to express a condition, equivalent to using si (if) with a conjugated verb. Here, de no parar means the exact same thing as si no para (if it doesn't stop). When making this infinitive structure negative, the no must be placed directly between de and the infinitive.

Question 2

Why does the subject la máquina come after the infinitive parar?

Accepted Answer

In Spanish, when an infinitive verb has its own specific subject (in this case, the machine is the thing doing the stopping), that subject naturally goes immediately after the infinitive. Saying de la máquina no parar would sound awkward and unnatural to a native speaker.

Question 3

Why is se needed in se bajará esta palanca?

Accepted Answer

This is an example of the passive se. The sentence means "this lever will be lowered," but we aren't specifying who is going to lower it (a worker, an automated system, etc.). Without se, the sentence would literally mean "this lever will lower," which doesn't make sense since the lever cannot perform the action itself.

Question 4

Could I say para más seguridad instead of para mayor seguridad?

Accepted Answer

You could, and people would understand you, but mayor (greater) sounds much more natural and professional here. In Spanish, it is very common to pair mayor rather than más with abstract nouns like seguridad (safety), importancia (importance), or dificultad (difficulty) to express a higher degree of that quality.

De no parar la máquina, se bajará esta palanca para mayor seguridad.

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