The Arabic nominative, المرفوع, most often identifies the phrase presented as the subject of a clause or as the predicate of an ordinary verbless sentence. On a regular singular triptote, it appears as definite -u or indefinite -un: المهندسُ “the engineer” and مهندسٌ “an engineer.” Duals and sound masculine plurals use larger endings such as ـانِ and ـونَ, so “nominative” is a syntactic case, not simply another name for the vowel u.
The key question is always: which construction governs this phrase, and what role does it perform? A finite active verb licenses a nominative subject. An ordinary nominal clause licenses a nominative topic and nominative predicate. كان and its sisters keep their subject nominative but assign accusative to their predicate. Unvocalized spelling and sentence-final pause may hide the short ending, yet the noun phrase remains nominative.
If the distinction between syntactic case and its audible ending is new, begin with What Iʿrāb Does. The present page applies that distinction specifically to nominative environments.
Subjects of verbal clauses
In an active verbal clause, the doer or experiencer is the subject and is nominative. In the common verb–subject order, a definite singular subject has -u in fully inflected connected reading.
وصل الطبيب إلى العيادة مبكرا.
waṣala ṭ-ṭabību ʾilā l-ʿiyādati mubakkirā.
The doctor arrived at the clinic early.
The verb وصل licenses subject الطبيبُ. The preposition إلى separately governs genitive العيادةِ, and مبكرًا is an accusative manner adverb. Naming all three relations is safer than associating “first noun” with one case.
An indefinite subject normally takes tanwīn -un when it can be pronounced in connected speech.
وصل طبيب جديد إلى القسم مساء.
waṣala ṭabībun jadīdun ʾilā l-qismi masāʾ.
A new doctor arrived at the department in the evening.
Both طبيبٌ and its agreeing adjective جديدٌ are nominative and indefinite. The adjective follows the noun in case, definiteness, gender, and number.
When the subject precedes the verb, it is still nominative. The construction also affects agreement: a pre-verbal plural subject normally triggers full plural agreement on the verb.
المهندسات راجعن المخطط قبل الاجتماع.
ʾal-muhandisātu rājaʿna l-mukhaṭṭaṭa qabla l-ijtimāʿ.
The female engineers reviewed the plan before the meeting.
The preceding subject المهندساتُ is nominative, visibly marked by -u after the sound feminine plural ending -āt. The feminine plural verb راجعن agrees fully with it.
Nominative markers vary by declension class. The dual has ـانِ, and the sound masculine plural has ـونَ. These endings are visible even in unvocalized text.
شارك المهندسان في الاجتماع، وقدم المهندسون ثلاثة اقتراحات.
shāraka l-muhandisāni fī l-ijtimāʿi, wa-qaddama l-muhandisūna thalāthata qtirāḥāt.
The two engineers participated in the meeting, and the engineers presented three proposals.
The governors and roles are the same in both clauses: each active verb licenses a nominative subject. What changes is the morphological realization: dual -āni and sound masculine plural -ūna.
Topic and predicate in nominal clauses
Present-tense Arabic normally has no overt equivalent of English is in a simple equation or description. The initial topic (المبتدأ) and its predicate (الخبر) are nominative unless another governor changes the construction.
الطريق مزدحم هذا الصباح.
ʾaṭ-ṭarīqu muzdaḥimun hādhā ṣ-ṣabāḥ.
The road is crowded this morning.
Definite الطريقُ is the nominative topic. Indefinite adjective مزدحمٌ functions substantivally as the nominative predicate. English word order alone does not show a case relation, while careful Arabic reading marks both components.
هذه القاعة مركز التدريب الجديد.
hādhihi l-qāʿatu markazu t-tadrībi l-jadīdu.
This hall is the new training center.
Indeclinable هذه occupies a nominative topic position locally; attached القاعةُ is analyzed as nominative in the demonstrative phrase. Predicate مركزُ is nominative and begins an iḍāfa, so it has no article or tanwīn; its complement التدريبِ is genitive. Adjective الجديدُ is nominative because it modifies the construct head مركزُ, not genitive التدريبِ. Nominative does not guarantee that a visible -un will appear.
An adverbial or prepositional predicate can precede an indefinite topic. In that common pattern, the delayed noun is still nominative.
في القاعة ضيوف كثيرون.
fī l-qāʿati ḍuyūfun kathīrūna.
There are many guests in the hall.
Prepositional phrase في القاعة is the fronted predicate. Delayed topic ضيوفٌ is nominative, and its human plural adjective كثيرون is nominative as well. Position after a preposition does not make every later noun genitive; only the preposition's own complement القاعةِ is genitive.
The nominative subject of كان
The verb كان “was” changes the case pattern of a nominal clause asymmetrically. Its subject remains nominative, while its predicate becomes accusative. The verb is the governor of both roles.
كان البحر هادئا عند الغروب.
kāna l-baḥru hādiʾan ʿinda l-ghurūb.
The sea was calm at sunset.
البحرُ is the nominative subject of كان; هادئًا is its accusative predicate. English speakers sometimes treat both noun phrases after “be” alike, but Arabic كان deliberately splits their case.
كانت النتائج واضحة في التقرير النهائي.
kānati n-natāʾiju wāḍiḥatan fī t-taqrīri n-nihāʾiyy.
The results were clear in the final report.
Broken plural النتائجُ is the nominative subject. Because it denotes non-human entities, predicate واضحةً is feminine singular as well as accusative. Case and agreement answer different questions and must both be checked.
Definite -u, indefinite -un, and construct forms
A regular definite singular has -u because الـ excludes tanwīn. A regular indefinite singular has -un. The first term of an iḍāfa is definite or indefinite through the whole construct, but it never takes الـ or tanwīn; it can still show nominative -u.
وصل مدير المدرسة مع مساعد جديد.
waṣala mudīru l-madrasati maʿa musāʿidin jadīd.
The school principal arrived with a new assistant.
Subject head مديرُ is nominative but has no tanwīn because it is the first term of مدير المدرسة. The construct relation governs genitive المدرسةِ. After مع, مساعدٍ is genitive rather than nominative; final adjective جديد is read pausally.
A compact three-case comparison makes the contrast visible in fully inflected reading:
هذا كتاب مفيد، وقرأت كتابا مفيدا، وبحثت عن كتاب مفيد.
hādhā kitābun mufīdun, wa-qaraʾtu kitāban mufīdan, wa-baḥathtu ʿan kitābin mufīd.
This is a useful book; I read a useful book; and I looked for a useful book.
The first كتابٌ is a nominative predicate, the second كتابًا an accusative direct object, and the third كتابٍ a genitive prepositional complement. Each adjective follows the noun's case; the last adjective loses its final short vowel only because it stands at pause.
Answers, labels, and citation forms
A short answer inherits its role from the question. If the missing answer is the subject or nominal predicate, a fully inflected reading is nominative.
من المسؤول عن المشروع؟ سامر.
mani l-masʾūlu ʿani l-mashrūʿi? sāmirun.
Who is responsible for the project? Samer.
The pedagogically pronounced سامرٌ supplies the nominative predicate/answer understood from the question. In natural pause it would usually be heard simply as Sāmir. By contrast, a dictionary headword, vocabulary-card label, or title outside a sentence is normally cited in its pausal form, not automatically with -un. “Citation form” and “indefinite nominative in connected syntax” must not be conflated.
الكلمة الجديدة في القائمة هي استدامة.
ʾal-kalimatu l-jadīdatu fī l-qāʿimati hiya stidāma(h).
The new word on the list is ‘sustainability.’
Quoted استدامة is presented as a word form and read pausally. It would be misleading to conclude that every isolated cited item visibly carries nominative tanwīn.
Nominative analysis when no -u is audible
The maqṣūr noun الفتى cannot display a final short -u after long ā. Its nominative is estimated. Sentence-final pause also silences a regular short ending. Neither fact changes the syntactic role.
وصل الفتى ومعه رسالة.
waṣala l-fatā wa-maʿahu risāla(h).
The young man arrived with a letter.
The verb licenses الفتى as its nominative subject; the marker is estimated on final ى. Learners should describe it as “nominative with an estimated ending,” not as “a noun without case.”
Common Mistakes
Giving a dual subject the oblique ending
❌ وصل المهندسين إلى الموقع.
Incorrect — a dual subject is nominative and requires المهندسان, not oblique المهندسين.
✅ وصل المهندسان إلى الموقع قبل الظهر.
waṣala l-muhandisāni ʾilā l-mawqiʿi qabla ẓ-ẓuhr.
The two engineers arrived at the site before noon.
Making the predicate of an ordinary nominal clause accusative
❌ الطريق مزدحما اليوم.
Incorrect — without كان or another accusative governor, the nominal predicate is nominative مزدحمٌ.
✅ الطريق مزدحم اليوم.
ʾaṭ-ṭarīqu muzdaḥimuni l-yawm.
The road is crowded today.
Pronouncing tanwīn on a definite noun
❌ وصل الطبيب إلى العيادة.
waṣala ṭ-ṭabībun ʾilā l-ʿiyāda
Incorrect reading — الـ and tanwīn cannot occur together on an ordinary noun.
✅ وصل الطبيب إلى العيادة.
waṣala ṭ-ṭabību ʾilā l-ʿiyāda(h).
The doctor arrived at the clinic.
Adding -u at every sentence-final pause
❌ وصل المدير.
waṣala l-mudīru
Incorrect as an ordinary pausal reading — nominative syntax remains, but final short -u is normally silenced.
✅ وصل المدير.
waṣala l-mudīr.
The director arrived.
Confusing a verb's mood with its subject's case
❌ لن يصل المهندسين غدا.
Incorrect — لن makes the verb subjunctive; it does not make the dual subject accusative.
✅ لن يصل المهندسان غدا.
lan yaṣila l-muhandisāni ghadā.
The two engineers will not arrive tomorrow.
Key Takeaways
- Active verbal subjects and the topic and predicate of an ordinary nominal clause are nominative.
- كان keeps its subject nominative but makes its predicate accusative.
- Regular definite singulars show -u, regular indefinite singulars -un, while dual and plural classes have their own nominative markers.
- Construct heads can be nominative without tanwīn; weak or indeclinable forms may have estimated or local nominative case.
- Pause and dictionary citation often hide endings. Do not treat every isolated noun as an audibly inflected -un form.
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- Indeclinable Words and Local IʿrābA2 — Analyze pronouns, demonstratives, and relative pronouns whose syntactic case changes even though their form does not.
- The AccusativeA1 — Use the accusative for direct objects, major adverbials, and predicates of كان while controlling -a, -an, and pausal forms.
- What Iʿrāb DoesA1 — Understand how nominative, accusative, and genitive case signal a noun phrase's role even when writing or pause hides the ending.