If:
- before a yaa or waw there is a sakin
Then
- Swap the harakats of the و or ي with the sukoon before it
Example:
| يَقْوُلُ | ——> | يَقُوْلُ |
| يَبيِعُ | ——> | يَـبِيْعُ |
If:
- The waw or yaa has a fatha
- before the yaa or waw there is a sakin
Then
- change the waw or yaa to a alif
Example:
| يُقْوَلُ | ——> | يُقَالُ |
| يُبْيَعُ | ——> | يُـبَاعُ |
The conditions for this change to take place are that the waw and yaa do not occur:
- In the faa kalimah e.g. تَوَعَّدَ , تَوَفَّى and تَيَسَّرَ
- In the Ayn lafeef[1] e.g. طَوَى and حَيِيَ
- Before an extraneous madd e.g. طَوِيْلٌ, غَيُوْرٌ and غَيَابَةٌ
- In colours or defects e.g. عَوِرَ and صَيِدَ
If:
- After a alif, waw or yaa there is a sakin
Then
- Drop the alif, waw or yaa
- Give the letter before
- A damma if it is a waw
- A kasra it is is a yaa
- A fatha if it is an alif
Example:
| يَقْوُلْنَ | ——> | يَقُلْنَ |
| يَـبْيِعْنَ | ——> | يَـبِعْنَ |
| يُقَالْنَ | ——> | يُقَلْنَ |
| يُبَاعْنَ | ——> | يُبَعْنَ |
[1] When two harf illah occur in one verb
