فَرِحَ الطِّفْلُ بِالْهَدِيَّةِ — The child became happy with the gift.
يَفْرَحُ الطِّفْلُ بِالْهَدِيَّةِ — The child becomes happy with the gift.
عَمِلَ حَامِدٌ فِي الْمَدْرَسَةِ — Hamid worked at the school.
يَعْمَلُ حَامِدٌ فِي الْمَدْرَسَةِ — Hamid works at the school.
عَلِمَ الطَّالِبُ الْجَوَابَ — The student knew the answer.
يَعْلَمُ الطَّالِبُ الْجَوَابَ — The student knows the answer.