Learn Spanish (Latin America): Fue injusto que no nos dejaran entrar al camerino. - It was unfair that they didn't let us into the dressing room.

The phrase Fue injusto que (It was unfair that) is an evaluative clause expressing a past judgment. Judgments, emotions, and opinions trigger the subjunctive mood in the dependent clause. Because the trigger verb (fue) is in a past tense, the dependent verb must be in the past (imperfect) subjunctive to match the time frame, resulting in dejaran.

Could we use Era injusto que (imperfect) instead of Fue injusto que (preterite)?

Yes, but it changes the context. Using the preterite (fue) focuses on a single, specific completed event—it was unfair that they didn't let you in on that one specific night. If you used the imperfect (era), it would imply an ongoing or repeated unfair situation in the past, such as 'It used to be unfair that they never let us in.' Both would still trigger the imperfect subjunctive dejaran.

Why is there no preposition like a or de between dejaran and entrar?

When dejar is used to mean 'to let' or 'to allow,' it connects directly to the following infinitive without any preposition. You simply say dejar hacer algo (to let [someone] do something). Learners sometimes confuse this with dejar de + infinitive, which means 'to stop doing something.'

Why use camerino for 'dressing room' instead of probador?