The Arabic accusative, المنصوب, marks several roles that English usually distinguishes by word order or prepositions. Its most familiar use is the direct object: the person or thing directly affected by a transitive verb. It also marks important adverbials of time, place, duration, manner, and circumstance, and it marks the predicate of كان and its sisters.
On a regular singular triptote, a definite accusative has -a and an indefinite accusative has -an: الكتابَ and كتابًا. Tanwīn fatḥ normally receives a supporting ا in spelling, but not after ة, final ى, or in other established exception patterns. At pause, كتابًا is normally heard as kitābā, whereas رسالةً is normally heard as risāla(h). These pronunciations do not alter the underlying accusative role.
See What Iʿrāb Does for the three-case framework, or compare the object patterns below directly with the nominative.
Direct objects: what the verb acts on
A transitive verb is the governor of its direct object. The active subject is nominative; the object is accusative. In a definite singular noun, fully inflected connected reading makes the contrast -u versus -a.
راجع المحرر الخبر قبل النشر.
rājaʿa l-muḥarriru l-khabara qabla n-nashr.
The editor reviewed the report before publication.
The verb راجع licenses nominative subject المحررُ and accusative direct object الخبرَ. The object follows the subject here, but its case comes from the verb–object relation, not merely from being second.
An indefinite object normally shows -an, including on an agreeing adjective.
قرأ الطالب كتابا جديدا في المكتبة.
qaraʾa ṭ-ṭālibu kitāban jadīdan fī l-maktaba(h).
The student read a new book in the library.
Both كتابًا and جديدًا are accusative and indefinite. English marks a new book only by its position and article; Arabic agreement spreads case and indefiniteness to the adjective.
Dual and sound masculine plural objects use oblique endings rather than a short -a. These endings remain visible in ordinary unvocalized spelling.
قابل المدير المعلمين الجديدين بعد الاجتماع.
qābala l-mudīru l-muʿallimayni l-jadīdayni baʿda l-ijtimāʿ.
The director met the two new teachers after the meeting.
The verb assigns accusative to المعلمين, realized as dual -ayni; adjective الجديدين matches it. The same -ayni also serves the dual genitive, so the governor and role distinguish the cases.
A construct head can be accusative without tanwīn. Iḍāfa removes tanwīn from its first term, while the larger sentence still assigns that head case.
قرأت تقرير اللجنة كاملا هذا الصباح.
qaraʾtu taqrīra l-lajnati kāmilan hādhā ṣ-ṣabāḥ.
I read the committee's report in full this morning.
Direct object تقريرَ is accusative but has neither الـ nor tanwīn because it begins تقرير اللجنة. Second term اللجنةِ is genitive. Circumstantial كاملًا is also accusative and says in what state or manner the reading was completed.
Word order cannot replace case analysis
Formal Arabic can front an object for contrast or focus (formal). In careful reading, the fronted noun remains accusative and the delayed subject remains nominative.
هذه الرسالة كتب المدير، لا المساعد.
hādhihi r-risālata kataba l-mudīru, lā l-musāʿid.
It was this letter that the director wrote, not the assistant.
Demonstrative هذه occupies the local accusative position of the fronted object phrase, while الرسالةَ visibly carries its accusative analysis. Delayed المديرُ is the nominative subject. This marked order needs context, but it proves that “noun before the verb” does not automatically mean subject.
A three-case set with one lexeme shows why the governor matters:
وصل ضيف كريم، واستقبلنا ضيفا كريما، وتحدثنا مع ضيف كريم.
waṣala ḍayfun karīmun, wa-staqbalnā ḍayfan karīman, wa-taḥaddathnā maʿa ḍayfin karīm.
A generous guest arrived; we welcomed a generous guest; and we spoke with a generous guest.
The first phrase is nominative subject, the second accusative object, and the third genitive after مع. The final adjective is pausal, so its genitive short vowel is not heard even though agreement remains syntactically real.
Time, duration, place, and manner
Many adverbials are nouns used accusatively. Traditional grammar groups them into more specific categories, but learners can begin by asking whether the phrase supplies a time, duration, place, or circumstance without a preposition.
انتظرنا ساعتين أمام المكتب.
ʾintaẓarnā sāʿatayni ʾamāma l-maktab.
We waited for two hours in front of the office.
Duration ساعتين is accusative dual -ayni. Place noun أمامَ is also accusative and begins an iḍāfa with genitive المكتبِ, whose short ending is silenced at pause.
غادر الفريق مساء وعاد صباحا.
ghādara l-farīqu masāʾan wa-ʿāda ṣabāḥā.
The team left in the evening and returned in the morning.
Both time adverbials are accusative. Internal مساءً realizes -an because speech continues; sentence-final صباحًا has the natural pausal realization -ā.
The circumstantial accusative (الحال) describes the state in which a participant performs or undergoes an event.
عاد الموظفون مسرعين بعد الإنذار.
ʿāda l-muwaẓẓafūna musriʿīna baʿda l-ʾindhār.
The employees returned in a hurry after the alarm.
Nominative subject الموظفون contrasts with accusative plural circumstance مسرعين. English uses the adverbial phrase “in a hurry”; Arabic uses an accusative agreeing participle.
An absolute object or cognate accusative can reinforce the verb or characterize how an event unfolds (formal).
تحسن الأداء تحسنا ملحوظا خلال الربع الأخير.
taḥassana l-ʾadāʾu taḥassunan malḥūẓan khilāla r-rubʿi l-ʾakhīr.
Performance improved noticeably during the last quarter.
Verbal noun تحسنًا shares the root of تحسن and is accusative; adjective ملحوظًا agrees. This is characteristic of formal reporting and academic prose (formal, academic).
The predicate of كان
An ordinary nominal clause has a nominative topic and predicate. كان governs a different split: its subject is nominative, but its predicate is accusative.
كان الجو معتدلا عند وصولنا.
kāna l-jawwu muʿtadilan ʿinda wuṣūlinā.
The weather was mild when we arrived.
الجوُّ is the nominative subject of كان; معتدلًا is its accusative predicate. The verb itself is the governor that establishes this case pattern.
أصبحت القاعة هادئة بعد انتهاء النقاش.
ʾaṣbaḥati l-qāʿatu hādiʾatan baʿda ntihāʾi n-niqāsh.
The hall became quiet after the discussion ended.
Sister verb أصبحت likewise keeps subject القاعةُ nominative and assigns accusative to predicate هادئةً. Because the predicate is not sentence-final, its -atan is fully pronounced.
Visible, estimated, local, and pausal accusative
Maqṣūr nouns ending in ى have estimated case because no short case vowel can follow their long ā.
رأيت الفتى قرب المحطة.
raʾaytu l-fatā qurba l-maḥaṭṭa(h).
I saw the young man near the station.
The verb رأيت assigns accusative to الفتى, but the ending is estimated. Indeclinable demonstratives can instead occupy a local accusative position, as هذا does in رأيت هذا “I saw this.”
At pause, tanwīn fatḥ behaves differently according to spelling. A supported ا normally produces long -ā; tāʾ marbūṭa normally produces pausal -a(h).
كتبت رسالة.
katabtu risāla(h).
I wrote a letter.
Object رسالةً is accusative and indefinite in the analysis, although natural pause is risāla(h), not risālatan. A full -atan is heard when connected to a following word: كتبت رسالةً قصيرةً قبل السفر.
Finally, diptotes warn against equating fatḥa with accusative. In مررت بمساجدَ كثيرةٍ, preposition بـ governs genitive مساجدَ; the diptote realizes that genitive with fatḥa. Syntax names the case, morphology supplies its marker.
Common Mistakes
Guessing objecthood from order while ignoring visible dual case
❌ قابل المدير المعلمان بعد الاجتماع.
Incorrect for “The director met the two teachers” — the direct object must be oblique/accusative المعلمين.
✅ قابل المدير المعلمين بعد الاجتماع.
qābala l-mudīru l-muʿallimayni baʿda l-ijtimāʿ.
The director met the two teachers after the meeting.
Leaving the predicate of كان nominative
❌ كان المهندسون مستعدون للبدء.
Incorrect — the predicate of كان is accusative, so the sound masculine plural must be مستعدين.
✅ كان المهندسون مستعدين للبدء.
kāna l-muhandisūna mustaʿiddīna li-l-badʾ.
The engineers were ready to begin.
Inventing tanwīn at sentence-final pause
❌ كتبت رسالة.
katabtu risālatan
Incorrect as the normal pausal reading — sentence-final ة is realized as -a(h), although the noun is syntactically accusative.
✅ أرسلت رسالة.
ʾarsaltu risāla(h).
I sent a letter.
Calling diptote fatḥa accusative after a preposition
❌ مررت بمساجد كثيرة في المدينة.
marartu bi-masājidin kathīratin fī l-madīna
Incorrect reading — بـ governs genitive, but the diptote مساجد realizes that genitive with fatḥa and no tanwīn, not -in.
✅ مررنا بمساجد كثيرة في العاصمة.
mararnā bi-masājida kathīratin fī l-ʿāṣima(h).
We passed many mosques in the capital.
Treating subjunctive verb mood as accusative noun government
❌ لن يراجع المحررين التقرير.
Incorrect — لن governs the verb's mood; it does not make a sound masculine plural subject oblique.
✅ لن يراجع المحررون التقرير اليوم.
lan yurājiʿa l-muḥarrirūna t-taqrīra l-yawm.
The editors will not review the report today.
Key Takeaways
- Transitive verbs govern accusative direct objects; order is a clue, not the definition.
- Accusative also marks major adverbials, circumstances, cognate objects, and the predicate of كان and its sisters.
- Regular definite singulars use -a, and regular indefinite singulars use -an; dual and plural classes have their own markers.
- Definite and construct forms lack tanwīn, while ى, indeclinables, and pause can hide or alter the audible realization.
- A diptote's genitive fatḥa and a verb's subjunctive mood are not nominal accusative case.
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Start learning Arabic →Related Topics
- The NominativeA1 — Use the nominative for subjects and nominal predicates, and distinguish grammatical -u/-un from unmarked citation and pausal forms.
- The GenitiveA2 — Use the genitive after prepositions and in iḍāfa, with accurate -i/-in, oblique, diptote, estimated, and pausal realizations.
- What Iʿrāb DoesA1 — Understand how nominative, accusative, and genitive case signal a noun phrase's role even when writing or pause hides the ending.