When condition and answer are both verbal clauses, their verb forms can combine in these ways.
Condition formAnswer formExampleimperfectimperfectإِنْ تَدْرُسْ تَنْجَحْpastpastإِنْ دَرَسْتَ نَجَحْتَpastimperfectإِنْ حَضَرَ الْمُعَلِّمُ نَبْدَأْimperfectpastإِنْ تَجْتَهِدْ نَجَحْتَ
Apply jussive only where an imperfect verb occurs; the past form remains built.