| After the main clause | porque and debido a que come after the main clause | Salgo temprano porque mañana tengo examen. | I'm leaving early because I have an exam tomorrow. |
| Before or after | ya que and puesto que present a known fact | Puesto que nadie protestó, se aprobó el plan. | Given that nobody objected, the plan was approved. |
| Two kinds of reason | without a comma, the reason for the fact; with a comma, the reason for what is said | Cierro la ventana porque hace frío. / Cierra la ventana, porque hace frío. | I'm closing the window because it's cold. / Close the window, because it's cold. |
| C1More linkers | gracias a que gives a favorable reason; por culpa de que, an unfavorable one | Gracias a que me avisaste, llegué a tiempo. / Perdimos el tren por culpa de que el taxi llegó tarde. | Thanks to your warning, I arrived on time. / We missed the train because the taxi was late. |
| C1Emphatic reason | porque before the main clause stresses the reason | Porque habla cuatro idiomas, lo contrataron. | It was because he speaks four languages that they hired him. |
| C1Negation | after no, the indicative negates the verb and the subjunctive negates the reason | No se va porque llueve. ≠ No se va porque llueva, sino porque es tarde. | He isn't leaving, because it's raining. ≠ He is leaving not because it's raining, but because it's late. |
| C2Spoken language | que gives the reason after a comma, in a colloquial register | Apúrate, que perdemos el tren. | Hurry up, we'll miss the train. |
| C2Excessive reason | de tanto … como presents the reason as excessive | No se veía el suelo de tantas hojas como había. | There were so many leaves that you couldn't see the ground. |
| C2Question | the reason being asked about takes the subjunctive | ¿Es que te callas porque esté tu jefe delante? | Are you keeping quiet because your boss is there? |
| Trap | an asserted reason takes the indicative | Ya que sabes tanto, explícalo tú. | Since you know so much, you explain it. |
| Trap | debido a que takes the preposition a | Se retrasó debido a que había niebla. | He was delayed because there was fog. |