اعراب جلسوا في المقعد – إسألنا

The sentence “جلسوا في المقعد” can be analyzed as follows: “جلسوا” is a past verb indicating a group action, with the pronoun “وا” referring to the group. “في” is a preposition indicating location, and “المقعد” is a genitive noun, with “الكسرة” at the end indicating its status as the object of the preposition. Overall, the sentence means “They sat in the seat.”