This is the 3060th most frequent Turkish word.
başladığında
"When it begins/starts."
The word 'başladığında' here functions as a conjunctive form of the verb 'başlamak' (to start) in Turkish, indicating the point in time when the action ('starting of rain') occurred.
Yağmur başladığında herkes evine döndü.
When it started raining, everyone returned to their homes.
In this context, 'başladığında' refers to the specific moment the class (lesson) commenced, setting the temporal framework for the following action.
Ders başladığında öğrenciler dikkatle dinliyordu.
When the lesson started, the students were listening attentively.
Here, 'başladığında' introduces the commencement of an event (the movie's start), emphasizing the condition or state of the surroundings during that occurrence.