13- مَا فَتِئَ، 14- مَا انْفَكَّ، 15- مَا دَامَ، 16- لَيْسَ.
Translation: 13. Mā fatiʾa, 14. mā infakka, 15. mā dāma, 16. laysa.
Mā fatiʾa and mā infakka convey continuance, mā dāma duration, and laysa negation. In the incomplete-verb construction their ism is nominative and khabar accusative.