Por plus infinitive

Question

When to use "por" plus infinitive verb

Answer 1

There is no rule that I have ever heard of that determines when to use this combination. It´s just sentence structure, ie: Por quererla a ella, ya no tengo dinero / Por ser fieles, ellos tienen muchos años juntos / Ahora hay muchas inundaciones en México por estar la atmósfera en un desequilibrio.

Answer 2

Just as an extra point it's all prepositions, not just por, that you follow with an infinitive rather than a conjugated verb.

The reason for this is that in both English and Spanish, a preposition is followed by an object, which is usually a noun but can also be a pronoun or verb that functions as a noun.

In English the verb form functioning as a noun will be the gerund, -ing word, but in Spanish this isn't possible. Instead the infinitive functions as a noun.

Pablo recibió un premio por ser buen alumno.

Pablo received a prize for being a good student.

Answer 3

as a result of

because

Answer 4

I think the real question here (and not a simple easily answered one) is when do you use Por. There are many good articles on that, both here, and on other websites. Some of the contexts you´ll see there will include an infinitive too. But in general, as Julian says, I don´t think there is a single good generalization about the por-plus-infinitive construction. Mostly case by case.