Compare the forms carefully:
● لَا يَكْتُبُ — negative; لَا is separate
● لَيَكْتُبُ — present-specific here; لَـ is attached
● سَيَنْصُرُ — future; سَـ is attached
● سَوْفَ تَعْلَمُونَ — future; سَوْفَ is separate
The small marker changes the reading, while the person form still identifies who performs the action.