Case for Things That Cannot Change

Level 5

In Arabic, most words change their endings to show their role (Nominative, Accusative, Genitive). However, some words like pronouns and demonstratives are 'frozen' (Mabnī). Al-iʿrāb al-maḥallī is the grammatical concept that says these frozen words still occupy a 'place' (maḥall) of a specific case, even if you can't see the vowel change.

How It Works

Arabic grammar distinguishes between Mu‘rab (declinable) and Mabni (fixed) words. Local I'rab occurs when a fixed word or phrase occupies a functional slot in a sentence that requires a specific case.

1. The Concept of 'Place': When a word is Mabni, its final vowel is fixed. This can be a fatha (e.g., هُوَ), a damma (e.g., نَحْنُ), a kasra (e.g., أَمْسِ), or a sukun (e.g., أَنَا, هُمْ). Because it cannot change to show its function, we assign it a 'local' case based on its role. Crucially, Particles (like مِن) always have no place in I'rab (lā mahalla lahā).

2. Common Categories:

3. Terminology: Instead of saying a word is Marfu‘, we say it is في محل رفع (fī mahalli raf‘). Similarly, في محل نصب for Accusative, في محل جر for Genitive, and في محل جزم for Jussive.

Examples (6)

  1. هذا ولدٌ ذكيٌ

    This is a smart boy.

    Word by Word: This boy smart

    'Hādhā' is a demonstrative noun. It is Mabnī, but because it is the subject (Mubtada), it is 'in the place of Nominative' (fī maḥalli rafʿ).

  2. رأيتُ هؤلاءِ الطلابَ

    I saw these students.

    Word by Word: I-saw these the-students

    'Hā'ulā'i' always ends in a kasra. Here it is the direct object, so it is 'in the place of Accusative' (fī maḥalli naṣb).

  3. سلمتُ على الذي نجحَ

    I greeted the one who succeeded.

    Word by Word: I-greeted upon who succeeded

    'Alladhī' follows a preposition. It is 'in the place of Genitive' (fī maḥalli jarr).

  4. أنتَ طالبٌ مجتهدٌ

    You are a hardworking student.

    Word by Word: You student hardworking

    The pronoun 'Anta' is the subject. It is Mabnī on fatḥa, in the place of Nominative.

  5. من نجحَ في الامتحان؟

    Who succeeded in the exam?

    Word by Word: Who succeeded in the exam?

    The interrogative noun من is Mabnī on sukūn. As the subject of the sentence, it is 'in the place of Nominative'.

  6. جلستُ حيثُ جلسَ أخي

    I sat where my brother sat.

    Word by Word: I-sat where sat my-brother

    The adverb 'ḥaythu' is Mabnī on ḍamma. Because it functions as an adverb of place, it is 'in the place of Accusative' (fī maḥalli naṣb).

Common Mistakes

  • Treating dual demonstratives as indeclinable (Mabnī).

    رأيتُ هذانِ الرجلينِ
    رأيتُ هذينِ الرجلينِ

    While most demonstratives are Mabnī (local case), the dual forms are fully declinable (Mu‘rab) and must change their endings to show the case.

  • Assuming all fixed words have a 'place' (Maḥall).

    حرف 'من' في محل جر
    حرف 'من' لا محل له من الإعراب

    Particles (like prepositions) are Mabnī but have NO grammatical place (lā maḥalla lahā). Only words that function as nouns or verbs have a Maḥall.

  • Forgetting that compound numbers 11 and 13-19 are Mabnī.

    جاءَ خمسةَ عشرُ رجلاً
    جاءَ خمسةَ عشرَ رجلاً

    Compound numbers from 11 to 19 (except 12) are fixed on fatḥa for both parts. They occupy a 'place' in the sentence (e.g., in the place of the subject) rather than changing their vowels.

How It Connects

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Case for Things That Cannot ChangeLevel 5

Learn This First

To understand local case (al-i'rab al-mahalli), you must first be familiar with the standard case system (i'rab) where endings change. You also need to know the specific groups of words that do not change their shape, such as pronouns and pointing words, because local case is the method used to describe their grammatical function.