Four Examples Given in the Book

Diptote Causes — Verb Patterns and Their Conditions

كَـ«أَحْمَدَ» وَ«يَشْكُرَ» وَ«تَغْلِبَ» وَ«نَرْجِسَ».
Translation: Such as Aḥmad, Yashkur, Taghlib and Nargis.

Here they are treated as proper names. The author is illustrating their verb-like patterns; these names are not all actual verbs in this context.