Rules 5–8 require attention to the position of wāw and to the structure around it.
No.ConditionOperationExample
5Initial wāw with ḍamma/kasraPermitted hamzahوُجُوهٌ / أُجُوهٌ
6Two special fatḥa-initial casesAttested exceptionsوَحَدٌ / أَحَدٌ
7Two vowelled initial wāwsObligatory first-wāw changeأَوَاصِلُ
8Wāw-final weak fuʿūl pluralYāʾ + preceding kasraدِلِيٌّ
Use the table as a comparison aid, not as a replacement for analyzing the forms on the preceding slides.