لازم lāzim is the central Cairene predicate for “must,” “have to,” “need to,” and inferential “must be.” Despite its English translation, it is not a finite verb. It stays invariant while the following bare imperfect marks the person who must act: لازم أمشي، لازم تمشي، لازم نمشي. This structural fact explains its negation, tense, and clitic behavior.
Historically and elsewhere in Arabic, لازم belongs to a wider lexical family with senses such as “necessary” and “binding.” For everyday Egyptian production, the useful analysis is an invariant necessity predicate. Do not manufacture a perfect, b-imperfect, future prefix, or imperative for it just because English must is called a modal verb.
The practical paradigm: invariant لازم, changing complement
The table is deliberately unlike a verb conjugation. لازم never changes; the bare imperfect after it identifies the actor. This construction is mainstream urban Cairene (informal/neutral).
| Actor | Necessity frame | Romanization | Natural meaning |
|---|---|---|---|
| أنا | لَازِمْ أَمْشِي | lāzim ʾamshi | I have to leave |
| إنت | لَازِمْ تِمْشِي | lāzim timshi | you (m.) have to leave |
| إنتي | لَازِمْ تِمْشِي | lāzim timshi | you (f.) have to leave |
| هو | لَازِمْ يِمْشِي | lāzim yimshi | he has to leave |
| هي | لَازِمْ تِمْشِي | lāzim timshi | she has to leave |
| إحنا | لَازِمْ نِمْشِي | lāzim nimshi | we have to leave |
| إنتوا | لَازِمْ تِمْشُوا | lāzim timshu | you (pl.) have to leave |
| هم | لَازِمْ يِمْشُوا | lāzim yimshu | they have to leave |
لازم أخلص الطلب قبل آخر الأسبوع.
lāzim ʾakhallaṣ iṭ-ṭalab ʾabl ʾākhir il-ʾusbūʿ.
I have to complete the application before the end of the week.
لازم تاخدي الدوا بعد الأكل.
lāzim tākhdi d-dawa baʿd il-ʾakl.
You need to take the medicine after eating. (to one woman)
لازم يرجعوا المفاتيح للأمن قبل ما يمشوا.
lāzim yiraggaʿu l-mafātīḥ lil-ʾamn ʾabl ma yimshu.
They have to return the keys to security before they leave.
The lower verb has no بـ because necessity makes the action nonasserted: the speaker presents it as required, not as an independently ongoing fact. The full construction is developed on the bare imperfect after لازم page.
Obligation can be personal or impersonal
With a person-marked lower verb, لازم says who must act. With a passive or intransitive lower clause, it can present an impersonal requirement without naming an enforcer. This makes it useful for practical instructions without the heavy institutional tone of formal regulations.
لازم الباب يتقفل بعد آخر موظف.
lāzim il-bāb yitʾifil baʿd ʾākhir mowaẓẓaf.
The door has to be closed after the last employee leaves.
لازم يبقى فيه نسخة احتياطية قبل التحديث.
lāzim yibʾa fīh noskha iḥtiyāṭiyya ʾabl it-taḥdīth.
There has to be a backup before the update.
English often uses must be with an adjective or noun. Egyptian commonly inserts يبقى/يكون because لازم scopes over a whole proposition: لازم يكون جاهز “it must be ready.” Present-time لازم جاهز is not the neutral equivalent.
Negation: مش لازم means “not necessary”
Because لازم is not finite, neutral negation uses independent مش: مش لازم. Crucially, مش لازم تعمل means “you do not have to do it,” not “you must not do it.” A prohibition instead uses ما...ش on the action or ممنوع.
مش لازم تيجي بدري؛ الاجتماع اتأجل للضهر.
mish lāzim tīgi badri; il-igtimāʿ itʾaggal liḍ-ḍohr.
You don’t have to come early; the meeting was postponed until noon.
ماتفتحش الملف ده؛ فيه بيانات شخصية.
ma-tiftaḥsh il-malaff da; fīh bayānāt shakhṣiyya.
Don’t open this file; it contains personal data.
Past and future necessity use tense carriers
Since لازم itself has no tense, كان locates necessity in the past. كان لازم تعمل may describe a real past requirement or, especially when the action did not happen, mean “you should have done.” Context supplies the counterfactual reading. ماكانش لازم means “it was not necessary” and often conveys “you shouldn’t have.”
كان لازم تبلغني إن المعاد اتغير.
kān lāzim tiballaghni inni l-miʿād itghayyar.
You should have told me that the appointment changed.
ماكانش لازم تدفعي الحساب كله لوحدك.
ma-kānsh lāzim tidfaʿi l-ḥisāb kollo liwaḥdik.
You didn’t have to pay the whole bill by yourself. (to one woman)
Future necessity can be understood from a future time phrase with plain لازم, or made explicitly prospective with حيبقى لازم “it will become necessary.” Do not attach future حـ directly to لازم.
من الشهر الجاي حيبقى لازم نسجل الحضور إلكتروني.
min ish-shahr il-gāy ḥa-yibʾa lāzim nisaggil il-ḥoḍūr ʾiliktirōni.
Starting next month, we’ll have to register attendance electronically.
Inferential لازم: “must be”
لازم can express a conclusion based on evidence rather than an obligation. The complement is often يكون plus a predicate or a perfect clause: لازم يكون نسي “he must have forgotten.” No person is ordering anyone; the speaker is judging the explanation as highly likely.
النور مطفي والعربية مش موجودة؛ لازم يكون خرج.
in-nūr maṭfi wi-l-ʿarabiyya mish mawgūda; lāzim yikūn kharag.
The light is off and the car is gone; he must have gone out.
الرسالة وصلت مرتين، فلازم يكون فيه خطأ في النظام.
ir-risāla wiṣlit marratēn, fa-lāzim yikūn fīh khaṭaʾ fin-niẓām.
The message arrived twice, so there must be an error in the system.
The diagnostic is whether the complement describes an action under someone’s control. لازم يصلح العربية can be an obligation (“he has to repair the car”); لازم يكون صلحها is normally an inference (“he must have repaired it”). Prosody and context may still matter.
Clitics belong to the complement, not لازم
Object suffixes attach to the action verb: لازم أكلمه، لازم تديها، لازم نراجعهم. There is no ordinary لازمك meaning “you must” in this construction. Egyptian does have lexical expressions such as اللازم “what is necessary” and اعمل اللازم “take the necessary action” (professional/administrative), but those contain a noun-like use, not a modal object suffix.
لازم أكلمها النهارده قبل ما تسافر.
lāzim ʾakallimha n-naharda ʾabl ma tisāfir.
I have to call her today before she travels.
المدير قاللي أراجع الشكوى وأعمل اللازم.
il-modīr ʾālli ʾarāgiʿ ish-shakwa wa-ʾaʿmal il-lāzim.
The manager told me to review the complaint and take the necessary action. (professional)
No verb paradigm, imperative, or participle
The categories “perfect stem,” “b-imperfect,” “imperative,” and “object clitic on the verb” do not apply to modal لازم. Its future and past come from يبقى/كان, its command force comes from the whole necessity statement, and its person marking comes from the complement. A form like لازمي would not be a feminine imperative. This absence is a grammatical fact, not a missing entry to guess.
Formal يجب أن (formal/MSA) appears in regulations, news, and careful code-switching. It is not more correct than colloquial لازم; it belongs to a different register. Institutional Egyptian may combine formal vocabulary with colloquial syntax, but learners should not blend MSA endings into an otherwise Cairene sentence.
A short dialogue
أ: لازم نجيب أصل العقد ولا الصورة كفاية؟
A: lāzim nigīb ʾaṣl il-ʿaʾd walla ṣ-ṣūra kifāya?
A: Do we have to bring the original contract, or is the copy enough?
ب: مش لازم الأصل، بس لازم الصورة تكون واضحة.
B: mish lāzim il-ʾaṣl, bass lāzim iṣ-ṣūra tikūn wāḍḥa.
B: The original isn’t necessary, but the copy has to be clear.
Common Mistakes
1. Conjugating لازم for the subject.
❌ إحنا لازمين نمشي دلوقتي.
Incorrect for ‘we must leave’—modal لازم is invariant.
✅ إحنا لازم نمشي دلوقتي عشان نلحق القطر.
iḥna lāzim nimshi dilwaʾti ʿashān nilḥaʾ il-ʾaṭar.
We have to leave now so we can catch the train.
2. Adding بـ to the required action.
❌ لازم بتراجع الأرقام قبل ما تبعتها.
Incorrect—the complement after لازم is bare.
✅ لازم تراجع الأرقام قبل ما تبعتها للعميل.
lāzim tirāgiʿ il-ʾarʾām ʾabl ma tibʿatha lil-ʿamīl.
You have to check the figures before sending them to the client.
3. Using مش لازم as a prohibition.
❌ مش لازم تدخل الأوضة.
This means ‘you don’t have to enter,’ not ‘you must not enter.’
✅ ماتدخلش الأوضة عشان الأرض لسه مبلولة.
ma-tidkhulsh il-ʾōḍa ʿashān il-ʾarḍ lissa mablūla.
Don’t enter the room because the floor is still wet.
4. Attaching a future prefix directly to لازم.
❌ حلازم نغير الخطة بكرة.
Incorrect—لازم does not take the future prefix.
✅ بكرة حيبقى لازم نغير الخطة لو العدد زاد.
bukra ḥa-yibʾa lāzim nighayyar il-khoṭṭa law il-ʿadad zād.
Tomorrow we’ll have to change the plan if the number increases.
Key Takeaways
- Keep لازم invariant; person marking belongs to the bare imperfect after it.
- Use مش لازم for “not necessary” and a negative imperative for “must not.”
- Use كان لازم for past or counterfactual necessity and حيبقى لازم for explicitly future necessity.
- Read لازم يكون... from context as obligation or evidence-based inference, and attach clitics to the lower verb.
Now practice Arabic
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Start learning Arabic →Related Topics
- Ability and ObligationA2 — Distinguish personal ability, situational possibility, permission, suitability, obligation, and prohibition in Cairene Egyptian.
- Bare Imperfect after لازمA2 — Use invariant لازم with a person-marked bare imperfect for obligation, past necessity, prohibition, lack of necessity, and strong inference.
- The Present Nominal SentenceA1 — Build Egyptian present identity, description, location, possession-like, and existential clauses without inserting an English-style copula.
- قدر yiʾdar — canB1 — Use قدر for ability, achieved success, permission, negation, and bare verb complements in mainstream Cairene Arabic.
- كان kān — be; occurA2 — Use the hollow verb كان for past and future copulas, backgrounded habits, possibilities, and Egyptian conditional frames.