Derived Forms and Valency | Arabic (Modern Standard) Grammar

Valency is the participant structure licensed by a verb: how many core participants it has, which appear as direct objects, and which require prepositions. Arabic derived Forms often correlate with changes in valency. A causative Form may add a causer; a middle Form may suppress that causer and promote the affected participant to subject; a reciprocal verb may package several participants into one plural subject.

These are recurring relationships, not automatic operations. أخرج really is a causative relative of خرج, but أعلن “announce” is not productively derived by adding a participant to a current everyday Form I meaning. The safest unit to learn is still the lexical verb plus its verified complement frame.

Causatives can add a participant

Compare Form I خَرَجَ / يَخْرُجُ / خُرُوجًا “go out” with Form IV أَخْرَجَ / يُخْرِجُ / إِخْرَاجًا “take out; cause to leave,” root خ-ر-ج. In the intransitive clause, the affected entity is the subject. In the causative clause, a new causer becomes subject, and the entity that goes out becomes the direct object.

Verb	Participant frame	Example skeleton
خَرَجَ	theme as subject	خَرَجَ الدُّخَانُ مِنَ الْغُرْفَةِ
أَخْرَجَ	causer + theme object	أَخْرَجَ الْفَنِّيُّ الدُّخَانَ مِنَ الْغُرْفَةِ

خرج الدخان من الغرفة بعد فتح النافذة.

kharaja d-dukhānu mina l-ghurfati baʿda fatḥi n-nāfidha.

The smoke left the room after the window was opened. (Formal; intransitive Form I.)

أخرج الفني الدخان من الغرفة بمروحة قوية.

ʾakhraja l-fanniyyu d-dukhāna mina l-ghurfati bimirwaḥatin qawiyya.

The technician cleared the smoke from the room with a powerful fan. (Formal; causative Form IV.)

Form II can also add a causer. حَسُنَ / يَحْسُنُ “be good” is intransitive; حَسَّنَ / يُحَسِّنُ / تَحْسِينًا “improve something” adds an agent and a direct object. Form V تَحَسَّنَ / يَتَحَسَّنُ / تَحَسُّنًا returns the improved entity to subject position.

حسنت البلدية الإضاءة فتحسنت السلامة في الشارع.

ḥassanati l-baladiyyatu l-ʾiḍāʾata fataḥassanati s-salāmatu fī sh-shāriʿ.

The municipality improved the lighting, so safety on the street improved. (Formal Form II/Form V contrast.)

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Count semantic participants, not just visible nouns. A causative typically adds a causer; the original subject may then become an object. This explains the syntactic relationship better than translating the Form as English make.

Causation can produce two objects—but not always

Form I عَلِمَ “know” can take the known content. Form II عَلَّمَ “teach” commonly licenses the learner and the material taught: علّم المدرسُ الطلابَ القاعدةَ. Form IV أَعْلَمَ “inform” also adds an informed person, but its normal frame often introduces the information with بـ: أعلمهم بالقرار. Related causatives need not share identical syntax.

علمت المدربة الموظفات إجراءات السلامة الجديدة.

ʿallamati l-mudarribatu l-muwaẓẓafāti ʾijrāʾāti s-salāmati l-jadīda.

The trainer taught the female employees the new safety procedures. (Formal; Form II with two complements.)

أعلمت المديرة الموظفات بتغيير موعد التدريب.

ʾaʿlamati l-mudīratu l-muwaẓẓafāti bitaghyīri mawʿidi t-tadrīb.

The director informed the female employees that the training time had changed. (Formal; Form IV with بـ.)

English teach someone something and inform someone of something happen to display the difference too, but English is not a dependable guide to Arabic object marking. Store علّم شخصًا شيئًا and أعلم شخصًا بشيء separately.

Middle and inchoative verbs reduce the external participant

Form V and Form VII often present an event from the affected participant's side. In طوّر الفريق النظام “the team developed the system,” Form II has an external agent and an object. In تطوّر النظام “the system developed,” Form V makes the changing entity the subject and leaves the cause unexpressed. Likewise, Form I كَسَرَ العاملُ الزجاجَ contrasts with Form VII اِنْكَسَرَ الزجاجُ.

طورت المهندستان النموذج خلال شهرين.

ṭawwarati l-muhandisatāni n-namūdhaja khilāla shahrayn.

The two female engineers developed the model over two months. (Formal VSO; singular Form II verb.)

تطور النموذج بعد اختباره في ظروف واقعية.

taṭawwara n-namūdhaju baʿda khtibārihi fī ẓurūfin wāqiʿiyya.

The model developed after it was tested under real conditions. (Formal; Form V middle/inchoative.)

كسر الطفل المقبض فانكسر الجزء الداخلي أيضا.

kasara ṭ-ṭiflu l-miqbaḍa fa-nkasara l-juzʾu d-dākhiliyyu ʾayḍan.

The child broke the handle, and the inner part broke as well. (Form I/Form VII contrast.)

The unexpressed causer is not a hidden grammatical subject of تطور or انكسر. These are morphologically active intransitive verbs. If the speaker needs to assert an action while suppressing its agent, Arabic has an internal passive: كُسِرَ المقبض “the handle was broken.” The Forms VII and VIII middle-voice page develops that distinction.

“Reflexive” does not mean “no object”

A traditional reflexive label can obscure lexical valency. Form V تَذَكَّرَ / يَتَذَكَّرُ / تَذَكُّرًا “remember” takes the remembered thing directly. تَعَلَّمَ takes a subject or skill directly. Form VIII اِكْتَشَفَ / يَكْتَشِفُ / اِكْتِشَافًا “discover” is fully transitive. These verbs may be historically or semantically subject-centered, but their contemporary syntax still includes an object.

تذكرت الطبيبة موعد المراجعة في اللحظة الأخيرة.

tadhakkarati ṭ-ṭabībatu mawʿida l-murājaʿati fī l-laḥẓati l-ʾakhīra.

The doctor remembered the follow-up appointment at the last moment. (Formal; transitive Form V.)

اكتشفت الباحثتان خطأ في ترميز البيانات.

iktashafati l-bāḥithatāni khaṭaʾan fī tarmīzi l-bayānāt.

The two female researchers discovered an error in the data coding. (Formal VSO; transitive Form VIII.)

English sometimes uses a reflexive pronoun where Arabic does not, and vice versa. Do not insert نفسه simply because a grammar calls a derived Form “reflexive.”

A preposition can change the sense of one derived verb

Form VIII اِعْتَمَدَ / يَعْتَمِدُ / اِعْتِمَادًا, root ع-م-د, illustrates valency inside a single lexeme. With a direct object, it commonly means “approve; adopt.” With على, it means “rely on; depend on.” The preposition is meaning-bearing, not decorative.

اعتمدت اللجنة النسخة النهائية من اللائحة.

iʿtamadati l-lajnatu n-nuskhata n-nihāʾiyyata mina l-lāʾiḥa.

The committee approved the final version of the regulations. (Formal; direct object.)

اعتمدت اللجنة على بيانات مستقلة في قرارها.

iʿtamadati l-lajnatu ʿalā bayānātin mustaqillatin fī qarārihā.

The committee relied on independent data in its decision. (Formal; على frame.)

Other derived verbs have equally specific frames: شارك في “participate in,” تعاون مع a partner على a task, استفسر عن a topic, and استغنى عن “dispense with.” Learning only the Form number leaves the sentence unfinished.

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Write a vocabulary entry as a miniature construction: اعتمد شيئًا “approve something,” but اعتمد على شيء “rely on something.” A preposition can distinguish senses more sharply than the English gloss does.

Exceptions and lexical competition

Not every intransitive verb has a causative partner, and a root may offer more than one causative-looking Form. أوقف is the neutral transitive “stop something; make someone stop” beside intransitive وقف in many contexts. Form II وقّف exists in other established uses and registers, but it is not a freely interchangeable spelling of أوقف. Similarly, both Form II and Form IV occur in the broad causative neighborhood of some roots while lexical usage assigns them different meanings.

If no conventional derived causative exists, Arabic can use an independent causative construction such as جعل + object + predicate/clause, or simply choose a different lexical verb. Morphology is not obligated to supply one word for every English make X do Y sentence.

Mood, agreement, and weak-root behavior

Valency does not replace finite grammar. After لن, a sound singular derived verb is subjunctive: لن يعتمدَ. After لم, it is jussive: لم يعتمدْ. A final-weak verb deletes its weak letter in the singular jussive. Form X اِسْتَغْنَى / يَسْتَغْنِي / اِسْتِغْنَاءً “dispense with,” root غ-ن-ي, therefore has لم يستغنِ عن.

لن تعتمد المؤسستان النظام قبل مراجعته قانونيا.

lan taʿtamida l-muʾassasatāni n-niẓāma qabla murājaʿatihi qānūniyyan.

The two institutions will not adopt the system before reviewing it legally. (Formal VSO; subjunctive singular verb.)

لم يستغن المختبران عن الفحص اليدوي بالكامل.

lam yastaghni l-mukhtabarāni ʿani l-faḥṣi l-yadawiyyi bil-kāmil.

The two laboratories did not dispense entirely with manual testing. (Final-weak jussive; singular verb in VSO.)

Common Mistakes

Assuming every causative uses Form II

❌ خرج الفني الدخان من الغرفة.

Incorrect for ‘the technician removed the smoke’—intransitive خرج cannot take this direct object; use أخرج.

✅ أخرج الفني الدخان من الغرفة بسرعة.

ʾakhraja l-fanniyyu d-dukhāna mina l-ghurfati bisurʿa.

The technician quickly cleared the smoke from the room.

Treating a middle verb as a passive with an agent

❌ انكسر الفني اللوح الزجاجي.

Incorrect—انكسر is intransitive and makes the affected entity the subject; it cannot take الفني as an agent subject plus اللوح as object.

✅ كسر الفني اللوح، فانكسر قرب الزاوية.

kasara l-fanniyyu l-lawḥa, fa-nkasara qurba z-zāwiya.

The technician broke the panel, and it broke near the corner.

Removing the object from every “reflexive” Form

❌ تذكرت الطبيبة عن نتيجة الفحص.

Incorrect—تذكر takes the remembered item directly, without عن.

✅ تذكرت الطبيبة الموعد قبل مغادرة العيادة.

tadhakkarati ṭ-ṭabībatu l-mawʿida qabla mughādarati l-ʿiyāda.

The doctor remembered the appointment before leaving the clinic.

Dropping a sense-changing preposition

❌ اعتمد المحللون الأرقام القديمة.

Incorrect for ‘relied on’—the direct-object frame suggests ‘approved/adopted’; reliance requires على.

✅ اعتمد المحللون على الأرقام المراجعة.

iʿtamada l-muḥallilūna ʿalā l-ʾarqāmi l-murājaʿa.

The analysts relied on the reviewed figures. (Formal VSO.)

Regularizing a final-weak jussive

❌ لم يستغني المختبر عن الفحص اليدوي.

Incorrect in careful MSA—final-weak يستغني loses ي after jussive لم.

✅ لم يستغن المختبر عن الفحص اليدوي.

lam yastaghni l-mukhtabaru ʿani l-faḥṣi l-yadawiyy.

The laboratory did not dispense with manual testing.

Key Takeaways

Causative derivation often adds a causer and shifts the original subject into object position.
Middle and inchoative verbs often suppress the external participant, but they are not grammatical passives.
A “reflexive” semantic history does not predict whether a modern verb takes a direct object.
Prepositions belong to lexical valency and can distinguish separate senses of the same verb.
Exceptions, competing Forms, mood, agreement, and weak-root behavior must all be learned from the verified verb, not from a template label.

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