٧- قاعدة قَالَ و بَاعَ

If:

• a fatha comes after و or ي with harakat

Then

• Change to alif

Example:

قَوَلَ	——>	قَالَ
بَيَعَ	——>	بَاعَ
دَعَوَا	——>	دَعَا
رَمَيَ	——>	رَمَى

The conditions for this change to take place are that the waw and yaa do not occur:

1. In the faa kalimah e.g. تَوَعَّدَ , تَوَفَّى and تَيَسَّرَ
2. In the Ayn lafeef^[1] e.g. طَوَى and حَيِيَ
3. Before the alif of تثنية e.g. دَعَوَا and رَمَيَا
4. Before an extraneous madd e.g. طَوِيْلٌ, غَيُوْرٌ and غَيَابَةٌ 
5. Before yaa tashdeed or the noons of takeed e.g. عَلَوِيٌّ and اِخْشَيَنَّ
6. In colours or defects e.g. عَوِرَ and صَيِدَ
7. On the scale of فَعَلَانَ, فَعَلى and فَعَلَةٌ e.g. دَوَرَانَ, سَيَلَانَ, صَوَرَى, حَيَدى and حَوَكَةٌ

In افتعال with the meaning of تفاعل e.g. اِجْتَوَرَ, اِعْتَوَر

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^[1] When two harf illah occur in one verb