Doubly Weak and Highly Irregular Verbs | Arabic (Levantine) Grammar

A genuinely doubly weak root contains two historical و/ي radicals. Lebanese طوى / بيطوي ṭawa / byiṭwe “fold” has root ṭ-w-y, so a medial glide and a final glide both affect its forms. The result is not “twice the same rule”: different cells preserve, vocalize, or reshape different parts of the root.

This page also treats highly irregular verbs such as إجا / بيجي / تعى “come.” That verb is not simply another member of the طوى class; it belongs here because learners need the same remedy—several verified principal parts, not analogy from one citation form.

A true doubly weak paradigm: طوى “fold”

The unsuffixed perfect طوى ends in written ى, the suffixed perfect rebuilds the edge as ـيت, and the nonpast contains both the medial w and final vowel in بيطوي. These forms make the two weak radicals visible only when compared.

Environment	Arabic	Romanization	Function
3ms perfect	طوى	ṭawa	he folded
1sg perfect	طويت	ṭawēt	I folded
3ms b-imperfect	بيطوي	byiṭwe	he folds
1sg b-imperfect	بطوي	bṭwe	I fold
3ms bare imperfect	يطوي	yiṭwe	that he fold / he will fold
2ms imperative	اطوي	iṭwe	fold!

طويت البطانيات وحطيتن عالرف العالي.

ṭawēt el-baṭṭāniyyāt w-ḥaṭṭēton ʿar-raff el-ʿāle.

I folded the blankets and put them on the high shelf. (informal; suffixed perfect with -ēt)

بيطوي الخريطة بعد ما يتأكد من الطريق.

byiṭwe l-kharīṭa baʿd ma yitʾakkad min eṭ-ṭarīʾ.

He folds the map after making sure of the route. (informal; habitual b-imperfect)

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For a doubly weak verb, ask what happens in each weak position separately. طوى → طويت diagnoses the final edge; طوى → بيطوي reveals the nonpast stem. The label alone predicts neither whole form.

The outer grammar remains ordinary

Double weakness changes the lexical stem, not the Lebanese aspect system around it. The independent b-imperfect marks a habit or contextual nonpast, عم + b-imperfect presents an unfolding event, and رح selects the bare imperfect.

هلق عم بيطوي القمصان وبيحطن بالشنطة.

hallaʾ ʿam byiṭwe l-ʾomṣān w-byiḥoṭṭon bish-shanṭa.

He's folding the shirts now and putting them in the suitcase. (informal; عم + coordinated b-imperfects)

رح يطوي الفرشة ويحطها بصندوق السيارة.

raḥ yiṭwe l-farshe w-yḥoṭṭa b-ṣondūʾ es-sayyāra.

He'll fold the mattress and put it in the car trunk. (informal; رح + bare imperfect)

اطوي الورقة بالنص، بس ما تقطعها.

iṭwe l-waraʾa bin-noṣṣ, bass ma tʾaṭṭaʿa.

Fold the paper in half, but don't tear it. (informal; masculine singular command)

English has no aspect prefix comparable to Lebanese b-. A learner can produce the right weak stem and still build the wrong clause by saying bare يطوي as an independent habit or رح بيطوي after the future particle. Morphology and clause grammar are two separate decisions.

Suffixes expose the rebuilt final edge

Before a perfect suffix, طوى uses طويـ: طويت “I/you masculine folded.” An object clitic follows that suffixed host: طويتها “I folded it/her.” Do not attach a suffix directly to the citation spelling and invent طوىت.

طويتها عالسريع، فطلعت القماشة مجعلكة.

ṭawēta ʿas-sarīʿ, f-ṭilʿet el-ʾmēshe mzhaʿlake.

I folded it in a hurry, so the fabric came out wrinkled. (informal; rebuilt perfect stem plus feminine object clitic)

ما طويت القميص منيح لأنه كان بعده رطب.

ma ṭawēt el-ʾamīṣ mnīḥ laʾanno kēn baʿdo raṭeb.

I didn't fold the shirt properly because it was still damp. (informal; negative perfect)

Related words may confirm the root, but they do not supply the whole spoken paradigm. The maṣdar طيّ ṭayy “folding” (neutral/formal technical vocabulary) shows yet another compression of the same consonantal material. This is why root recognition and form production must remain distinct.

Highly irregular does not mean doubly weak

إجا / بيجي “come” is high-frequency and highly irregular, but it should not be relabeled as a normal طوى-type verb. Its perfect alternates among إجا، جيت، إجت، إجوا; its nonpast is بيجي; and its positive imperative comes from a different historical stem, تعى.

Environment	Arabic	Romanization	Meaning
3ms perfect	إجا	izha	he came
1sg / 2ms perfect	جيت	zhēt	I came / you came
3fs perfect	إجت	izhit	she came
3pl perfect	إجوا	izho	they came
3ms b-imperfect	بيجي	byizhe	he comes
3ms bare imperfect	يجي	yizhe	that he come / he will come
2ms positive imperative	تعى	taʿa	come!

إجت الممرضة تقيسله الضغط قبل الفحص.

izhit el-mmarriḍa tʾīslo ḍ-ḍagheṭ ʾabl el-faḥeṣ.

The nurse came to take his blood pressure before the examination. (neutral; irregular feminine perfect plus purpose chain)

تعى لعنا عالعشا، بس ما تجي قبل التمانية.

taʿa la-ʿinna ʿal-ʿasha, bass ma tzhe ʾabl et-tmēnye.

Come to our place for dinner, but don't come before eight. (informal; suppletive positive command versus bare-form prohibition)

The negative command ما تجي returns to the nonpast family; it is not built by adding ما to تعى. That split is genuine lexical suppletion. The weak-imperative guide develops the contrast across person and number.

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“Irregular” is a description, not a conjugation. Store إجا–جيت–بيجي–تعى together; then place those forms inside the same perfect, b-imperfect, bare, and command constructions used elsewhere.

Why analogy has strict limits

Two verbs may share one visible feature without sharing a paradigm. طوى and حكى both end in ى, but their perfect and nonpast vowels are lexical. إجا also ends in ا, yet its command تعى is suppletive. A written final alif therefore diagnoses a question to investigate, not an answer.

حكى رامي القصة، وأنا طويت الخريطة.

ḥaka Rāme l-ʾiṣṣa, w-ana ṭawēt el-kharīṭa.

Rami told the story, and I folded the map. (neutral; two different final-weak outcomes)

Some true doubly weak verbs occur mainly in formal, literary, or specialized vocabulary. Do not manufacture a Beirut paradigm by stripping endings from an MSA table. Verify the Lebanese perfect, suffixed perfect, b-imperfect, command, and register. If only a formal form is attested, label it (formal) rather than presenting it as everyday speech.

Affirmative and negative minimal pairs

بيطوي المناشف قبل ما يسكر المحل.

byiṭwe l-manāshef ʾabl ma ysakker el-maḥall.

He folds the towels before closing the shop. (affirmative habitual)

ما بيطوي المناشف قبل ما يسكر المحل.

ma byiṭwe l-manāshef ʾabl ma ysakker el-maḥall.

He doesn't fold the towels before closing the shop. (negative habitual; b- remains)

Dialogue: form choice across time and modality

طويت تياب السفر ولا بعد؟

ṭawēt tyēb es-safar walla baʿd?

Dima: Did you fold the travel clothes yet? (informal; completed-event question)

بعد لأ، هلق عم بطوي الغسيل اليومي.

baʿd laʾ, hallaʾ ʿam bṭwe l-ghasīl el-yōme.

Fadi: Not yet. I'm folding the everyday laundry now. (informal; first-person progressive)

إذا إجا كريم بكير، خليه يطوي المناشف.

iza izha Karīm bkīr, khallī yṭwe l-manāshef.

Dima: If Karim comes early, have him fold the towels. (informal; irregular perfect plus caused bare form)

منيح، ورح اطوي تياب السفر بعدين.

mnīḥ, w-raḥ iṭwe tyēb es-safar baʿdēn.

Fadi: Good, and I'll fold the travel clothes later. (informal; future bare form)

Common Mistakes

Attaching -t directly to the citation spelling

❌ أنا طوىت البطانية.

Incorrect — the suffixed perfect rebuilds the final edge as طويت.

✅ أنا طويت البطانية وحطيتها بالخزانة.

ana ṭawēt el-baṭṭāniyye w-ḥaṭṭēta bil-khzēne.

I folded the blanket and put it in the wardrobe. (informal)

Omitting b- from an independent habit

❌ يطوي القمصان كل يوم.

Incorrect for an ordinary independent habit — bare يطوي needs a licensing environment.

✅ بيطوي القمصان كل يوم قبل ما يفتح المحل.

byiṭwe l-ʾomṣān kill yōm ʾabl ma yiftaḥ el-maḥall.

He folds the shirts every day before opening the shop. (habitual b-imperfect)

Keeping b- after رح

❌ رح بيطوي الفرشة بكرا.

Incorrect in the Beirut baseline — رح licenses bare يطوي.

✅ رح يطوي الفرشة بكرا قبل النقلة.

raḥ yiṭwe l-farshe bokra ʾabl en-naʾle.

He'll fold the mattress tomorrow before the move. (informal future)

Inventing the command of إجا

❌ إجي لعندي بعد الشغل.

Incorrect in the Beirut command paradigm — the positive imperative is تعى.

✅ تعى لعندي بعد الشغل ومنطلب أكل.

taʿa la-ʿinde baʿd esh-shoghol w-mnṭlob akel.

Come over after work and we'll order food. (informal masculine singular command)

Treating all final-alif spellings alike

❌ طوى وحكى وإجا إلهم نفس التصريف.

Incorrect — the visible final alif does not erase their different principal parts and histories.

✅ بحفظ طوى وبيطوي وطويت سوا.

baḥfaẓ ṭawa w-byiṭwe w-ṭawēt sawa.

I memorize ṭawa, byiṭwe, and ṭawēt together. (metalinguistic learning strategy)

Key Takeaways

True doubly weak verbs contain two w/y radicals; طوى–طويت–بيطوي–اطوي shows how the two weak positions interact. Highly irregular إجا–جيت–بيجي–تعى needs the same principal-parts method but is not thereby a member of the same class. Preserve normal Lebanese b-, عم + b-, bare, future, and negation syntax around the verified lexical stem, and stop analogy when actual spoken evidence stops.

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