Trilateral Bare Regular - Bab 4: Fataha Yaftahu & Guttural Letters Rule

1. Bab 4: Fataha Yaftahu

The fourth regular door is فَتَحَ يَفْتَحُ.
Its basic signature is that the middle root letter has Fathah in both past and Mudhaari'.
The verbal noun given here is الْفَتْحُ, meaning opening.

2. First Half of the Sarf-e-Sagheer

Read the opening sequence in two connected blocks.
1. Active: فَتَحَ يَفْتَحُ فَتْحًا فَهُوَ فَاتِحٌ.
2. Passive: فُتِحَ يُفْتَحُ فَتْحًا فَهُوَ مَفْتُوْحٌ.
This gives the active and passive verbs together with Ism Fa'il and Ism Maf'ool.

3. Command, Prohibition, Dharf and Instruments

The next block gathers several familiar categories.

FormCategory
اِفْتَحْImperative
لَا تَفْتَحْProhibitive
مَفْتَحٌIsm Dharf
مِفْتَحٌ، مِفْتَحَةٌ، مِفْتَاحٌIsm Aalah

The instrument plurals shown are مَفَاتِحُ and مَفَاتِيْحُ.

4. Ism Tafdheel Forms

The final block contains the comparative forms shown for this Bab.

FeminineMasculineNumber / type
فُتْحَىٰأَفْتَحُSingular
فُتْحَيَانِأَفْتَحَانِDual
فُتْحَيَاتٌ / فُتَحٌأَفْتَحُوْنَ / أَفَاتِحُPlural forms

5. The Throat-Letter Rule

This Bab has a special recognition rule in this lesson.
1. Look at the second root letter — the Ayn-letter.
2. Look at the third root letter — the Laam-letter.
3. At least one of these two positions is a throat letter.
Example: in فَتَحَ, the final root letter ح is a throat letter.

6. The Six Throat Letters

There are six throat letters in this lesson:

LetterName
ءHamzah
هHaa
عAyn
حHaa
غGhayn
خKhaa

Memorize the six together as one recognition set.

7. A Simple Map of the Level

Remember these points:
1. Bab 4 is فَتَحَ يَفْتَحُ.
2. Its verbal noun here is الْفَتْحُ.
3. Its Sarf-e-Sagheer follows the familiar active → passive → command/prohibition → Dharf/instrument → comparative sequence.
4. The Bab is linked in this lesson with a throat letter in the second or third root position.
5. The six throat letters are ء، ه، ع، ح، غ، خ.