Partitive iḍāfas place a quantity or portion before the whole: نص المرتب “half the salary,” ربع الطلبة “a quarter of the students,” and أغلب الوقت “most of the time.” English usually inserts of and can put a determiner on the portion; compact Egyptian links the quantity directly to the set or substance.
This page uses mainstream Cairene as the production baseline. Everyday نص، ربع، أغلب، شوية coexist with careful بعض، معظم (formal/educated). The structures overlap semantically, but their register and syntax differ; ordinary Cairo speech does not add MSA case endings to any of them. Numerical fraction forms are developed under fractions and percentages.
Rule 1: put the part before the whole
The first term denotes the portion; the following noun denotes the whole from which that portion is understood. A definite whole makes the complete partitive definite even though the first term carries no article.
نص المرتب راح للإيجار.
nuṣṣ il-murattab rāḥ lil-ʾīgār.
Half the salary went on rent.
ربع الطلبة اختاروا المجموعة التانية.
rubʿ iṭ-ṭalaba ikhtāru l-magmūʿa t-tānya.
A quarter of the students chose the second group.
The agreement after a partitive often follows the semantic set. Human plural الطلبة licenses plural اختاروا. With a mass whole, singular agreement is natural: نص الشغل خلص “half the work is finished.” The quantifier itself does not acquire masculine or feminine agreement.
Rule 2: a bare complement gives an amount or type
Not every partitive complement is definite. نص ساعة means “half an hour,” شوية وقت means “some time,” and حتة عيش means “a piece of bread.” These phrases measure an indefinite quantity rather than selecting from a previously identified whole.
استنى نص ساعة وكلمني.
istanna nuṣṣ sāʿa wi-kallimni.
Wait half an hour and call me—addressed to a man.
محتاج شوية وقت عشان أقرر.
moḥtāg shuwayyit waʾt ʿashān ʾaʾarrar.
I need a little time to decide—said by a man.
هات حتة عيش للولد.
hāt ḥittit ʿēsh lil-walad.
Bring a piece of bread for the boy.
The audible t in شوية وقت and حتة عيش is the construct form of final ة. Spelling keeps ة before the separate noun. A following adjective would not create it: شوية صغيرة is shuwayya ṣughayyara “a small amount.”
Rule 3: choose between compact iḍāfa and من
Compact iḍāfa works especially well with conventional quantifier heads: نص، ربع، أغلب، بعض، شوية. To pick one or more members out of an identified set, Egyptian often uses من: واحد من الطلبة “one of the students,” اتنين من الكتب “two of the books.”
واحد من الموظفين حيرد عليك.
wāḥid min il-muwaẓẓafīn ḥa-yirudd ʿalēk.
One of the employees will get back to you—addressed to a man.
اختارت اتنين من الصور.
ikhtārit itnēn min iṣ-ṣuwar.
She chose two of the pictures.
Do not force every English of phrase into iḍāfa. واحد الطلبة is not the ordinary Cairene way to say “one of the students.” Conversely, conventional نص المرتب needs no من in its neutral compact form, though النص الأول من المرتب becomes natural when النص الأول is an independently definite, modified portion.
دفعت النص الأول من المبلغ النهارده.
dafaʿt in-nuṣṣ il-ʾawwil min il-mablagh innaharda.
I paid the first half of the amount today.
Here the article and adjective close النص الأول as a noun phrase, so من introduces the whole. This is different from compact نص المبلغ.
Rule 4: أغلب is conversational; بعض and معظم are careful
Everyday Cairene commonly uses أغلب for “most of” and شوية or a bare plural for many meanings of “some.” بعض “some of” and معظم “most of” are frequent in news, academic, and educated styles (formal/academic; also careful speech).
أغلب الناس هنا عارفين بعض.
ʾaghlab in-nās hina ʿārfīn baʿḍ.
Most people here know one another.
معظم المشاركين وافقوا على الاقتراح.
muʿẓam il-mushārkīn wāfaʾu ʿala l-iʾtirāḥ.
Most participants approved the proposal—careful or professional style.
بعض الملفات ناقصة بيانات.
baʿḍ il-malafāt nāʾṣa bayānāt.
Some of the files lack information—careful or formal style.
With nonhuman plural الملفات, feminine-singular ناقصة is the mainstream neutral agreement. The quantifier does not erase the agreement behavior of the semantic noun that follows it.
Rule 5: suffixes replace an established whole
When the whole is already active, a suffix can replace it: نصه “half of it/him,” أغلبهم “most of them,” بعضها “some of it/them.” The suffix agrees with the referent, not with the portion word.
| Full partitive | Suffix form | Meaning |
|---|---|---|
| نص الكتاب | نصه nuṣṣo | half of it |
| نص الكمية | نصها nuṣṣaha | half of it |
| أغلب الطلبة | أغلبهم ʾaghlabhum | most of them |
| بعض الملفات | بعضها baʿḍaha | some of them |
قريت نص الكتاب، وحكمل نصه التاني بكرة.
ʾarēt nuṣṣ il-kitāb, wi-ḥa-kammil nuṣṣo t-tāni bukra.
I read half the book, and I will finish its other half tomorrow.
الطلبة جم، وأغلبهم وصلوا بدري.
iṭ-ṭalaba gum, wi-ʾaghlabhum wiṣlu badri.
The students came, and most of them arrived early.
Suffixes are efficient anaphora. Repeating أغلب الطلبة is not ungrammatical, but أغلبهم is usually more cohesive once الطلبة is established.
Long chains: preserve the part–whole boundary
The whole can itself be an iḍāfa: نص ميزانية مشروع المدرسة “half the school project’s budget.” Build it from the right, then add the portion at the left.
نص ميزانية مشروع المدرسة راح للمعدات.
nuṣṣ mīzāniyyit mashrūʿ il-madrasa rāḥ lil-muʿiddāt.
Half the school project’s budget went on equipment.
تلات أرباع وقت اجتماع الفريق ضاع في التفاصيل.
talat ʾarbāʿ waʾt igtimāʿ il-farīʾ ḍāʿ fi t-tafāṣīl.
Three quarters of the team meeting time was lost in details.
The plural fraction noun أرباع follows three. The remaining chain identifies a stretch of time, so singular ضاع is natural despite the plural fraction noun. A long partitive is grammatical, but same-gender adjectives and nested roles can become hard to attach.
A dialogue: focus the portion with بتاع
إحنا صرفنا نص ميزانية المشروع الجديد؟
ʾiḥna ṣarafna nuṣṣ mīzāniyyit il-mashrūʿ il-gidīd?
Have we spent half the new project’s budget?
لأ، صرفنا النص المتبقي بتاع ميزانية المشروع القديم.
laʾ, ṣarafna n-nuṣṣ il-mutabaʾʾi bitāʿ mīzāniyyit il-mashrūʿ il-ʾadīm.
No, we spent the remaining half of the old project’s budget.
The answer makes النص المتبقي a definite focused unit, then attaches the heavier whole with بتاع (informal). Compact نص الميزانية is the neutral default; the analytic form is motivated by contrast and modification, not by a ban on long iḍāfa.
Common Mistakes
Putting the article on the portion head
❌ النص المرتب راح للإيجار.
Incorrect as the compact phrase ‘half the salary’—the first construct term cannot take الـ.
✅ نص المرتب راح للإيجار.
nuṣṣ il-murattab rāḥ lil-ʾīgār.
Half the salary went on rent.
Reversing the part and whole
❌ المرتب نص راح للإيجار.
Incorrect for a partitive noun phrase—this order starts a clause meaning ‘the salary is half.’
✅ نص المرتب راح كله للإيجار.
nuṣṣ il-murattab rāḥ kullo lil-ʾīgār.
The whole half of the salary went on rent.
Omitting من after an extracted individual
❌ واحد الطلبة حيرد عليك.
Incorrect for ‘one of the students’ in ordinary Cairene.
✅ واحد من الطلبة حيرد عليك.
wāḥid min iṭ-ṭalaba ḥa-yirudd ʿalēk.
One of the students will get back to you.
Treating a register choice as an error
بعض الناس اعترضوا.
baʿḍ in-nās iʿtaraḍu.
Some people objected—grammatical, but careful or formal in register.
ناس اعترضوا، وناس وافقوا.
nās iʿtaraḍu, wi-nās wāfaʾu.
Some people objected and others agreed—more conversational packaging.
Key Takeaways
- Compact partitives order portion before whole: نص المرتب، ربع الطلبة، أغلب الوقت.
- A bare complement gives an indefinite amount; a definite complement identifies the whole.
- Use من to extract an individual or numeral from an identified set: واحد من الطلبة.
- أغلب is conversational; بعض and معظم lean careful or formal.
- Suffixes retrieve a known whole, while بتاع can isolate a modified or contrastive portion before a heavy complement.
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