Subjunctive in Spanish
These type of sentences can include infinitive and subjunctive.
The examples were taken from the source
1.a. Hablan con el director de estudios para que les explique su nuevo horario. (They speak with the director of studies so he can explain them the schedule)
1.b. Hablan con el director de estudios para saber su nuevo horario. (They talk to the director of studies in order to know the new schedule)
The difference between the sentences is that one use Spanish subjunctive and the other the infinitive, but what they have in common is that we do not know if the director gave or explaint to them the new schecdule.
We may very well say that “they spoke with the director of studies to give them your new schedule ” (hablaron con el director para que les diera el nuevo horario) but he did not give it because he didn’t knew it. The fact that the verb is in the past, doesn’t mean that the they got to know about the schedule. We do not know that.
In these cases we project an hypotetical future, that could be more or less probable.
Moreover, also the conditional can also express the idea of not realization.
Let see an example like this SOURCE shows
Estudien mucho y así tendrán una buena nota mañana”
But we need a different syntactic structure. The structure we presented above is a coordinated copulative sentence. Both clauses are connected by the clause “Y” , and it is followed by the adverb “así” which provides a final value.
The idea is similar to the subordinate “con” “para”, but the ways that they are employed are different, because they have different syntactic structures. This is further evidence of the need to attend to syntactic factors (in addition to semantic) to explaining and understanding the behavior of the subjunctive mood in Spanish.
a. “La acompaña a que se comprara unos zapatos”
b. La acompaña a comprarse unos zapatos
The infinitive does partcipe the subject of the main verb in the realization of the action of the subordinate verb (comprar), so that this one also collaborates with or influence the action.
Structure: VERBO + A QUE + SUBJUNTIVO
Content: Purpose: PARA QUE