Check meaning, clause role and verb ending separately.
● Do not translate إِنْ as “not yet”; that is لَمَّا.
● Do not call the first verb the answer; it states the condition.
● Do not write إِنْ تَجْلِسُ أَجْلِسُ here. With two imperfect verbs, both should show the jussive result: إِنْ تَجْلِسْ أَجْلِسْ.