If:
then:
Example:
| يُدْعَوُ | → | يُدْعَى |
| يُدْعَوَانِ | → | يُدْعَيَانِ |
| أَعْلَوْتُ | → | أَعْلَيْتُ |
| إِسْتَعْلَوْتُ | → | إِسْتَعْلَيْتُ |
When wāw or yāʾ falls at the end of a word after an alif zāʾidah, it is converted to a hamzah.
Morphological rule: a ي in the lām position after a ḍammah converts to a و.
Morphological rule: a sākin wāw after a kasrah, a sākin yāʾ after a ḍammah, or an alif after a ḍammah or kasrah shifts to match the preceding vowel.
When a wāw stands as the lām kalimah after a kasrah, it converts to a yāʾ, yielding forms like duʿiya and dāʿiyah.
