En caso de que abran la dimensión, vamos a viajar al universo paralelo.

Questions & Answers about En caso de que abran la dimensión, vamos a viajar al universo paralelo.

Why is abran in the subjunctive here instead of the indicative abren?
The phrase en caso de que (in case) always triggers the subjunctive. This is because it introduces a hypothetical or contingent situation—an event that has not happened yet and might not happen at all.
Can I say por si instead of en caso de que to express "in case"?
Yes, por si or por si acaso is a very natural and common way to say "in case" or "just in case" in conversational Spanish. However, unlike en caso de que, the phrase por si is followed by the indicative mood. If you used it here, you would say por si abren la dimensión.
If we were the ones opening the dimension AND traveling, would the sentence structure change?
When the subject of both clauses is the same, you generally drop the que and use an infinitive. It would become En caso de abrir la dimensión, vamos a viajar... (In case of opening...). Because this original sentence has a subject change ("they" open it, "we" travel), you must use en caso de que followed by a conjugated subjunctive verb.
The action of opening the dimension will happen in the future. Why do we use the present subjunctive (abran) rather than a future tense?
While Spanish does have a future subjunctive, it is virtually obsolete in modern everyday speech and is mostly restricted to old literature and formal legal documents. Today, the present subjunctive perfectly handles both present and future contingencies.

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