In this Arabic grammar lesson, we will study a fundamental concept: الإِعْرَابُ, known in English as i‘rab or Arabic declension. This rule helps explain why the ending of a word changes according to its function in the sentence.
To progress in Arabic, it is essential to recognize grammatical cases, declinable nouns and indeclinable words. This distinction helps students read vocalized Arabic more accurately, analyze sentences, and understand texts in Classical Arabic, Modern Standard Arabic and Quranic Arabic.
In Arabic, some words change their ending according to their grammatical role. These words are called مُعْرَبٌ. Other words keep a fixed form, even when their function changes. These are called مَبْنِيٌّ.
What is i‘rab in Arabic?
The term الإِعْرَابُ refers to the grammatical analysis of a word according to its position in the sentence. It helps identify the function of the word and explains the vowel or sign that appears at its end.
A word may change its ending according to several factors:
- its role in the sentence;
- its position after a verb;
- its place in a nominal sentence;
- the presence of a preposition;
- its role in an annexation structure;
- whether it is definite or indefinite.
Understanding i‘rab therefore allows students to read Arabic more precisely and better understand the structure of sentences.
What are grammatical cases in Arabic?
Grammatical cases indicate the function of a word in a sentence. In Arabic, they often influence the vowel placed at the end of the word.
Declinable nouns can appear in three main cases:
- الرَّفْعُ or حَالَةُ الرَّفْعِ: the nominative case;
- النَّصْبُ or حَالَةُ النَّصْبِ: the accusative case;
- الجَرُّ or حَالَةُ الْجَرِّ: the genitive case.
Each case corresponds to specific grammatical functions. To learn Arabic correctly, it is not enough to memorize final vowels. Students also need to understand the function of the word in the sentence.
Declinable and indeclinable words in Arabic
In Arabic, words can be divided into two main categories:
- مُعْرَبٌ: a declinable word;
- مَبْنِيٌّ: an indeclinable word.
A declinable word can change its final vowel or ending according to its grammatical case. An indeclinable word generally keeps the same form, even if its function changes in the sentence.
| Type of word | Arabic term | Grammatical behavior | Example |
|---|---|---|---|
| Declinable word | مُعْرَبٌ | The ending may change | رَجُلٌ، رَجُلًا، رَجُلٍ |
| Indeclinable word | مَبْنِيٌّ | The final form remains stable | مَنْ، أَيْنَ، هَذَا |
What is a declinable noun in Arabic?
A declinable noun in Arabic is a noun whose ending changes according to its grammatical function. In Arabic, it is called اسْمٌ مُعْرَبٌ.
Most Arabic nouns are declinable. This means that their final vowel may vary depending on whether they are in the nominative, accusative or genitive case.
For example, a noun can be:
- in the nominative case when it is the subject or a main element of the sentence;
- in the accusative case when it is a direct object or appears in certain constructions;
- in the genitive case when it comes after a preposition or in an annexation structure.
Simple example with the word كِتَاب
| Case | Arabic sentence | Translation | Final sign |
|---|---|---|---|
| Nominative | هَذَا كِتَابٌ | This is a book. | ḍammah / dammatain |
| Accusative | أَخَذْتُ كِتَابًا | I took a book. | fatḥah / fathatain |
| Genitive | لَوْنُ الْكِتَابِ جَمِيلٌ | The color of the book is beautiful. | kasrah |
In these three examples, the word كِتَاب changes its ending according to its grammatical function.
The nominative case in Arabic: الرَّفْعُ
The nominative case is called الرَّفْعُ or حَالَةُ الرَّفْعِ in Arabic. Its main sign is the ḍammah.
- ـُ: damma;
- ـٌ: dammatain.
The nominative case is used especially for:
- the subject of the verb: الْفَاعِلُ;
- the first element of a nominal sentence: الْمُبْتَدَأُ;
- the information that completes the nominal sentence: الْخَبَرُ;
- the passive subject: نَائِبُ الْفَاعِلِ.
| Arabic example | Translation | Function |
|---|---|---|
| شَرَحَ الْمُدَرِّسُ الدَّرْسَ | The teacher explained the lesson. | Subject of the verb |
| الْقِطُّ جَمِيلٌ | The cat is beautiful. | Beginning of a nominal sentence |
| الْحَجَرُ ثَقِيلٌ | The stone is heavy. | Predicate of the nominal sentence |
| سُرِقَتِ الْحَقِيبَةُ | The bag was stolen. | Passive subject |
The accusative case in Arabic: النَّصْبُ
The accusative case is called النَّصْبُ or حَالَةُ النَّصْبِ in Arabic. Its main sign is the fatḥah.
- ـَ: fatha;
- ـً: fathatain.
The accusative case is used especially for:
- the direct object: الْمَفْعُولُ بِهِ;
- the absolute object: الْمَفْعُولُ المُطْلَقُ;
- the complement of time or place: الظَّرْفُ or الْمَفْعُولُ فِيهِ;
- the noun of إِنَّ and its sisters;
- the predicate of كَانَ and its sisters;
- the circumstantial complement of state: الْحَالُ;
- certain forms of specification: التَّمْيِيزُ.
| Arabic example | Translation | Function |
|---|---|---|
| شَرَحَ الْمُدَرِّسُ الدَّرْسَ | The teacher explained the lesson. | Direct object |
| إِنَّ الْقِطَّ جَمِيلٌ | Indeed, the cat is beautiful. | Noun of إِنَّ |
| أَصْبَحَ الْحَجَرُ ثَقِيلًا | The stone became heavy. | Predicate of أَصْبَحَ |
| جَلَسَ الْوَلَدُ وَحِيدًا | The boy sat alone. | State |
The direct object: الْمَفْعُولُ بِهِ
The direct object is one of the most frequent uses of the accusative. It refers to what directly receives the action of the verb.
Example:
فَمَنْ حَجَّ الْبَيْتَ
So whoever performs pilgrimage to the House. 2:158
In this expression, الْبَيْتَ is the direct object of the verb حَجَّ. It is therefore in the accusative case.
Another example:
وَأَنزَلَ الْفُرْقَانَ
And He sent down the Criterion. 3:4
Here, الْفُرْقَانَ is the direct object of the verb أَنزَلَ.
Verbs that take several objects
Some Arabic verbs can take two or more objects. In this case, several words may appear in the accusative case in the same sentence.
وَآتَيْنَاهُم بَيِّنَاتٍ مِّنَ الْأَمْرِ
And We gave them clear proofs of the matter. 45:17
إِنَّا جَعَلْنَاهُ قُرْآنًا عَرَبِيًّا
Indeed, We made it an Arabic Quran. 43:3
This type of construction is important for understanding Quranic sentences and texts in Classical Arabic.
The absolute object: الْمَفْعُولُ المُطْلَقُ
The absolute object is a verbal noun placed in the accusative case. It is used to reinforce the meaning of the verb, to indicate how many times an action occurs, or to specify how the action is performed.
1. The absolute object to reinforce the verb
It may be formed from the same root as the verb.
إِنَّا فَتَحْنَا لَكَ فَتْحًا مُّبِينًا
Indeed, We have granted you a clear victory. 48:1
وَرَتِّلِ الْقُرْآنَ تَرْتِيلًا
And recite the Quran slowly and clearly. 73:4
2. The absolute object to indicate number
It can also specify how many times an action takes place.
فَيَمِيلُونَ عَلَيْكُم مَّيْلَةً وَاحِدَةً
So they would make one assault against you. 4:102
3. The absolute object to specify manner
In some cases, the absolute object explains how the action is performed.
اتَّقُوا اللَّـهَ حَقَّ تُقَاتِهِ
Fear Allah as He should be feared. 3:102
The complement of time or place: الظَّرْفُ
Nouns used to indicate the time or place of an action are called الظَّرْفُ or الْمَفْعُولُ فِيهِ. They are often in the accusative case.
Examples:
قَالَ لَبِثْتُ يَوْمًا أَوْ بَعْضَ يَوْمٍ
He said: “I remained a day or part of a day.” 2:259
قَالَ رَبِّ إِنِّي دَعَوْتُ قَوْمِي لَيْلًا وَنَهَارًا
He said: “My Lord, I invited my people night and day.” 71:5
Common words related to time and place include:
- خَلْفَ: behind;
- تَحْتَ: under;
- بَعْدَ: after;
- أَمَامَ: in front of;
- فَوْقَ: above;
- قَبْلَ: before;
- وَرَاءَ: behind;
- أَسْفَلَ: below.
The genitive case in Arabic: الجَرُّ
The genitive case is called الجَرُّ or حَالَةُ الْجَرِّ in Arabic. Its main sign is the kasrah.
- ـِ: kasra;
- ـٍ: kasratain.
The genitive case is used especially for:
- the noun after a preposition: الاسْمُ بَعْدَ حَرْفِ الجَرِّ;
- the second term of an annexation: الْمُضَافُ إِلَيْهِ.
| Arabic example | Translation | Function |
|---|---|---|
| وَقَفَ الْمُدَرِّسُ فِي الْفَصْلِ | The teacher stood in the classroom. | Noun after a preposition |
| هَذِهِ قِطَّةُ الْبِنْتِ | This is the girl’s cat. | Second term of an annexation |
| فِي الْبَيْتِ | In the house. | Noun after a preposition |
| عَلَىٰ مَكْتَبٍ | On a desk. | Noun after a preposition |
Summary table of Arabic grammatical cases
| Grammatical case | Arabic name | Main sign | Example |
|---|---|---|---|
| Nominative | الرَّفْعُ | ḍammah or dammatain | كِتَابٌ |
| Accusative | النَّصْبُ | fatḥah or fathatain | كِتَابًا |
| Genitive | الجَرُّ | kasrah or kasratain | كِتَابٍ |
Why are final vowels important in Arabic?
In Arabic, final vowels often indicate the role of a word in the sentence. They help determine whether a noun is a subject, a direct object, a noun after a preposition or the second term of an annexation.
The three basic signs are:
- ḍammah: ـُ;
- fatḥah: ـَ;
- kasrah: ـِ.
This concept is especially important for learning Classical Arabic, Modern Standard Arabic and Quranic Arabic.
Difference between Arabic and English
In English, the function of words often depends on word order. For example:
- The man killed the snake.
- The snake killed the man.
In these two sentences, word order indicates who performs the action and who receives it.
In Arabic, word order can be more flexible because final vowels often indicate the grammatical function.
Example: the man and the snake
قَتَلَ الرَّجُلُ الثُّعْبَانَ
The man killed the snake.
Here, الرَّجُلُ carries a ḍammah, so it is the subject. The word الثُّعْبَانَ carries a fatḥah, so it is the direct object.
قَتَلَ الرَّجُلَ الثُّعْبَانُ
The snake killed the man.
Here, الثُّعْبَانُ carries a ḍammah, so it is the subject. The word الرَّجُلَ carries a fatḥah, so it is the direct object.
These examples clearly show the importance of Arabic declension.
Special signs of noun declension
In the basic form, a noun in the nominative case carries a ḍammah, a noun in the accusative case carries a fatḥah, and a noun in the genitive case carries a kasrah.
However, some nouns take other signs depending on their form. This is the case with the dual, the sound masculine plural, the sound feminine plural, the five nouns and some diptotes.
| Case | Main sign | Other possible signs | Example |
|---|---|---|---|
| Nominative | ḍammah | alif for the dual, wāw for the sound masculine plural and the five nouns | الْكِتَابُ جَمِيلٌ |
| Accusative | fatḥah | yā for the dual and sound masculine plural, alif for the five nouns, kasrah for the sound feminine plural | قَرَأْتُ الْكِتَابَ |
| Genitive | kasrah | yā for the dual, sound masculine plural and five nouns, fatḥah for certain diptotes | فِي الْكِتَابِ دَرْسٌ |
Examples of special declension signs
| Form | Arabic example | Translation | Sign |
|---|---|---|---|
| Dual in the nominative | الطَّبِيبَانِ مَاهِرَانِ | The two doctors are skilled. | alif |
| Dual in the accusative | رَأَيْتُ الطَّبِيبَيْنِ | I saw the two doctors. | yā |
| Sound masculine plural in the nominative | حَضَرَ الْمُوَظَّفُونَ | The employees came. | wāw |
| Sound masculine plural in the genitive | تَحَدَّثْتُ مَعَ الْمُوَظَّفِينَ | I spoke with the employees. | yā |
| Sound feminine plural in the accusative | رَأَيْتُ الطَّبِيبَاتِ الْمَاهِرَاتِ | I saw the skilled female doctors. | kasrah |
| Diptote in the genitive | هَذِهِ الْمَرْأَةُ مِنْ دِمَشْقَ | This woman is from Damascus. | fatḥah |
Fully declinable nouns: الْمُنْصَرِفُ
Among declinable words, some nouns are fully declinable. In Arabic, they are called الْمُنْصَرِفُ. They are also known as triptotes.
These nouns generally accept the three cases with their usual signs and can take tanwin when they are indefinite.
Examples:
- مُسْلِمٌ: a Muslim;
- خَادِمٌ: a servant;
- كِتَابٌ: a book;
- رَجُلٌ: a man.
Diptote nouns: المَمْنُوعُ مِنَ الصَّرْفِ
Some nouns are partially declinable. In Arabic, they are called المَمْنُوعُ مِنَ الصَّرْفِ. In English grammar explanations, they are often referred to as diptotes.
Diptotes generally do not take tanwin. They often take a fatḥah in the genitive case instead of a kasrah when they are not defined by ال and are not part of an annexation.
Common diptotes include:
- some proper nouns of non-Arabic origin;
- some geographical names;
- some adjectives of color;
- some adjectives with specific patterns.
Examples:
- أَسْوَدُ: black;
- أَحْمَرُ: red;
- إِبْرَاهِيمُ: Ibrāhīm;
- دَاوُودُ: Dāwūd;
- فِرْعَوْنُ: Pharaoh;
- غَضْبَانُ: angry.
What is an indeclinable word in Arabic?
An indeclinable word is a word whose final form does not change according to its position in the sentence. In Arabic, it is called مَبْنِيٌّ.
These words do not take the usual declension marks such as damma, fatha or kasra according to grammatical case. They also do not take tanwin like fully declinable nouns.
Indeclinable words are called الْكَلِمَاتُ الْمَبْنِيَّةُ.
Main categories of indeclinable words
Indeclinable words are easier to memorize by category. They include:
- interrogative words;
- personal pronouns;
- some demonstrative pronouns;
- some relative pronouns;
- prepositions;
- some particles;
- some adverbs or fixed words.
Examples of indeclinable words
| Category | Arabic examples | Meaning |
|---|---|---|
| Interrogative words | مَنْ، أَيْنَ، مَاذَا، هَلْ | who, where, what, question particle |
| Personal pronouns | أَنَا، أَنْتَ، هُوَ، هِيَ، هُمْ | I, you, he, she, they |
| Demonstratives | هَذَا، ذَلِكَ، هَذِهِ، تِلْكَ | this, that |
| Prepositions | عَلَىٰ، فِي، إِلَىٰ، مِنْ | on, in, to, from |
| Particles | لَمْ، لَنْ، إِنْ، لَا | negation, condition, fixed particles |
Nouns ending with alif maqṣūrah ى
Some nouns ending with an alif maqṣūrah ى keep a stable written form, even when their grammatical case changes. This alif is called الأَلِفُ المَقْصُورَةُ.
Examples:
- مُوسَىٰ: Mūsā;
- عِيسَىٰ: ʿĪsā;
- كُبْرَىٰ: greater / greatest;
- بُشْرَىٰ: good news;
- هُدَى: guidance.
According to detailed grammatical analysis, the declension of these nouns may be estimated or not visibly apparent. For a beginner, the important point is to remember that the visible ending does not change like ordinary nouns.
How to memorize indeclinable words
To memorize indeclinable words in Arabic, it is useful to learn them by category.
- interrogative words: مَنْ, أَيْنَ, مَاذَا;
- personal pronouns: أَنَا, أَنْتَ, هُوَ, هِيَ;
- demonstrative pronouns: هَذَا, ذَلِكَ, هَذِهِ;
- prepositions: عَلَىٰ, فِي, إِلَىٰ, مِنْ;
- particles: هَلْ, لَمْ, لَنْ, لَا.
This method makes it easier to learn Arabic grammar, Arabic vocabulary and Arabic reading step by step.
Why learn Arabic declension?
Arabic declension is an essential foundation for understanding the function of words in a sentence. It allows students to know whether a noun is a subject, a complement, a noun after a preposition or part of an annexation.
This concept is useful for:
- improving Arabic reading;
- progressing in Arabic grammar;
- understanding Classical Arabic;
- studying Modern Standard Arabic;
- analyzing certain texts in Quranic Arabic;
- building correct Arabic sentences.
To strengthen your foundations, you can consult our guide to learn Arabic online, review the Arabic alphabet or use our free books to learn Arabic.
Learn Arabic grammar with a teacher
Grammatical cases, declinable nouns, indeclinable words and the different uses of the accusative may seem difficult at first. However, with a progressive method, simple examples and regular correction, they become much clearer.
An Arabic teacher can help you recognize noun functions, understand declension signs and read sentences accurately.
At Al-Dirassa, you can follow online Arabic courses with personalized support. These courses are suitable for adults, children, beginners and students who want to progress in Classical Arabic, Modern Standard Arabic or Quranic Arabic.
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FAQ — I‘rab, declension and the accusative in Arabic
What does الإِعْرَابُ mean?
الإِعْرَابُ refers to grammatical analysis and the variation of a word’s ending according to its function in the sentence.
What are the three grammatical cases in Arabic?
The three main cases are the nominative الرَّفْعُ, the accusative النَّصْبُ and the genitive الجَرُّ.
What is the accusative case in Arabic?
The accusative case, called النَّصْبُ, is a grammatical case often marked by the fatḥah. It is used for the direct object, the absolute object, complements of time or place, the state, and certain constructions with إِنَّ or كَانَ.
What is a declinable word in Arabic?
A declinable word, called مُعْرَبٌ, is a word whose ending can change according to its grammatical case.
What is an indeclinable word in Arabic?
An indeclinable word, called مَبْنِيٌّ, keeps a stable final form, even when its grammatical function changes.
Why are final vowels important in Arabic?
Final vowels often help identify whether a word is a subject, direct object, noun after a preposition or the second term of an annexation.
Conclusion
In Arabic, declension, called الإِعْرَابُ, helps explain the grammatical function of words in a sentence. Some words are declinable: their ending changes according to their role. Other words are indeclinable: their form remains stable.
Declinable words, called مُعْرَبٌ, can be in the nominative, accusative or genitive case. The accusative case, called النَّصْبُ, deserves special attention because it appears in many constructions: direct object, absolute object, complement of time or place, state and specification.
Understanding these rules is an important foundation of Arabic grammar. With a clear method, regular examples and correction from a teacher, students can read, analyze and understand Arabic sentences with greater confidence.
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