Fixed vs. Flexible: Al-Muʿrab and Al-Mabnī
In our previous lesson, we saw how the ending of Zayd changes from Zayd-un to Zayd-an. But have you noticed that words like "Hādhā" (هَذَا - This) or "Min" (مِنْ - From) always look the same? This is the difference between Muʿrab and Mabnī.
1. Al-Muʿrab (المُعْرَب) – The Flexible
A Muʿrab word is one whose last letter's vowel changes based on its position in the sentence. Most Arabic nouns fall into this category.
- Example: البيتُ (The house-u), البيتَ (The house-a), البيتِ (The house-i).
- Why? It changes to show if it is the subject, object, or after a preposition.
2. Al-Mabnī (المَبْنِي) – The Fixed
The word Mabnī comes from the root for "building" (Bina'). Just like a building is fixed to the ground, these words are fixed to one specific ending. They never change, regardless of their role.
Common Mabnī Words:
- All Particles (Huroof): Like fī, min, ila.
- Pronouns: Like huwa, anta, ana.
- Demonstrative Nouns: Like hādhā, hādhihi.
- Most Verbs: Specifically Past Tense and Command verbs.
Quick Comparison
| Feature | Muʿrab (Flexible) | Mabnī (Fixed) |
|---|---|---|
| Ending Changes? | Yes (u, a, i) | No (Stays the same) |
| Category | Most Nouns & Present Verbs | All Particles, Past Verbs, Pronouns |
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