كَتَبَ is the central Form-I verb “write,” from root ك-ت-ب. It is a sound verb: its radicals stay stable, while ordinary person and mood endings attach regularly. The main difficulty is not conjugation but participant structure. The text written is a direct object, the recipient commonly follows إِلَى, the topic often follows عَنْ, and the physical surface follows a place expression such as فِي or عَلَى.
English can use write transitively (“write a report”) or with a person (“write to the manager”). Arabic makes the difference visible: كتب تقريرا but كتب إلى المدير. When both appear, either order is possible: كتب إلى المدير رسالة or كتب رسالة إلى المدير.
Its natural partner is قرأ “read”, whose object frames and hamza-bearing forms require a different lookup strategy.
Lookup card and principal parts
| Item | Verified form | Use |
|---|---|---|
| root and Form | ك-ت-ب، Form I | sound, usually transitive |
| perfect | كَتَبَ | he wrote |
| imperfect indicative | يَكْتُبُ | he writes / is writing |
| imperative, 2 m.sg. | اُكْتُبْ | write! |
| maṣdar | كِتَابَة | writing, authorship |
| active participle | كَاتِب | writer, author; writing |
| passive participle | مَكْتُوب | written; a written message in some contexts |
| passive | كُتِبَ — يُكْتَبُ | was written — is written |
Memorize كَتَبَ — يَكْتُبُ — اُكْتُبْ — كِتَابَة. The imperfect has u in its stem. The command also begins with u because its hamzat al-waṣl supplies the vowel needed before the initial cluster kt. In ordinary unvocalized text, command اكتب and first-person imperfect أكتب remain distinguished by the hamza: اكتب “write!” versus أكتب “I write.”
كتبت هدى ملخصا واضحا بعد المقابلة.
katabat hudā mulakhkhaṣan wāḍiḥan baʿda l-muqābala.
Huda wrote a clear summary after the interview. (Formal neutral.)
أكتب إلى أختي المقيمة في الرباط مساء كل أحد.
ʾaktubu ʾilā ʾukhtī l-muqīmati fī r-ribāṭi masāʾa kulli ʾaḥad.
I write to my sister who lives in Rabat every Sunday evening. (Neutral MSA.)
A compact paradigm and mood forms
The sound stem is stable. The perfect stem before consonant-initial endings is كَتَبْـ, while the imperfect stem is كْتُب after the person prefix.
| Person | Perfect | Indicative imperfect |
|---|---|---|
| أنا | كَتَبْتُ | أَكْتُبُ |
| أنتَ | كَتَبْتَ | تَكْتُبُ |
| أنتِ | كَتَبْتِ | تَكْتُبِينَ |
| هو | كَتَبَ | يَكْتُبُ |
| هي | كَتَبَتْ | تَكْتُبُ |
| هم | كَتَبُوا | يَكْتُبُونَ |
The singular moods are يَكْتُبُ indicative, لَنْ يَكْتُبَ subjunctive, and لَمْ يَكْتُبْ jussive. The five verbs lose nūn after a subjunctive or jussive governor: يكتبون but لن يكتبوا، لم يكتبوا.
لن تكتب الصحيفة اسمه قبل تأكيد الخبر من مصدرين.
lan taktuba ṣ-ṣaḥīfatu smahu qabla taʾkīdi l-khabari min maṣdarayn.
The newspaper will not print his name before confirming the report with two sources. (Journalistic; subjunctive after lan.)
لم يكتب الفريق الرد النهائي حتى الآن.
lam yaktubi l-farīqu r-radda n-nihāʾiyya ḥattā l-ʾān.
The team has not written the final response yet. (Formal neutral; jussive with a linking i.)
The imperative forms are اُكْتُبْ، اُكْتُبِي، اُكْتُبَا، اُكْتُبُوا، اُكْتُبْنَ. Initial hamzat al-waṣl is pronounced in isolation but elides after a preceding vowel: isolated اكتب uktub, connected واكتب wa-ktub.
اكتبي رقم الطلب في أعلى الصفحة.
uktubī raqma ṭ-ṭalabi fī ʾaʿlā ṣ-ṣafḥa.
Write the application number at the top of the page. (Formal instruction to one woman.)
Ranked meanings and valency
1. Write or compose something: direct object
The direct object names the written product or content: رسالة، تقرير، مقال، رواية، اسما، جملة. In context, كتب اسمه can mean “wrote his name,” while كتب الخبر can mean composed or published the news item.
كتب الطبيب ملاحظة قصيرة في ملف المريضة.
kataba ṭ-ṭabību mulāḥaẓatan qaṣīratan fī malaffi l-marīḍa.
The doctor wrote a short note in the patient's file. (Formal neutral.)
تكتب الروائية فصلا جديدا كل شهر.
taktubu r-riwāʾiyyatu faṣlan jadīdan kulla shahr.
The novelist writes a new chapter every month. (Neutral MSA.)
A complete reported proposition can follow أَنَّ: كتب أن النتائج أولية “he wrote that the results were preliminary.” In highly formal reports, a colon or direct quotation may instead present the exact wording.
كتب الخبير أن البيانات المتاحة لا تكفي لتقدير الخسائر.
kataba l-khabīru ʾanna l-bayānāti l-mutāḥata lā takfī litaqdīri l-khasāʾir.
The expert wrote that the available data were insufficient to estimate the losses. (Formal.)
2. Write to a recipient: إلى
When the important fact is communication with a person or institution, use كتب إلى + recipient. The text may be omitted because it is understood, or stated as a direct object.
كتب السكان إلى البلدية يطلبون إصلاح الطريق.
kataba s-sukkānu ʾilā l-baladiyyati yaṭlubūna ʾiṣlāḥa ṭ-ṭarīq.
The residents wrote to the municipality requesting that the road be repaired. (Formal.)
كتبت رسالة إلى شركة الطيران بشأن الحقيبة المفقودة.
katabtu risālatan ʾilā sharikati ṭ-ṭayarāni bishaʾni l-ḥaqībati l-mafqūda.
I wrote a letter to the airline about the missing bag. (Formal neutral.)
An attached pronoun after إلى is natural: كتب إليّ، كتب إليه، كتب إليهم. Do not attach the recipient directly to كتب as though Arabic copied English “write me.” كتب لي is also common and can make me the addressee (“wrote to me”); with an explicit written object, لـ may instead highlight its recipient or beneficiary, as in كتب لي رسالة “wrote a letter to/for me.” كتب إليّ is the less ambiguous way to present me specifically as the addressee of correspondence.
كتب إلي مدير المشروع يطلب نسخة محدثة من الميزانية.
kataba ʾilayya mudīru l-mashrūʿi yaṭlubu nuskhatan muḥaddathatan mina l-mīzāniyya.
The project manager wrote to me requesting an updated copy of the budget. (Business MSA.)
3. Write about a topic: عن and بشأن
كتب عن introduces the subject matter: كتب عن التعليم “wrote about education.” Formal correspondence often uses بشأن “concerning” before an issue or case. These are not recipient markers.
كتبت الصحفية عن أثر الجفاف في القرى الحدودية.
katabati ṣ-ṣaḥafiyyatu ʿan ʾathari l-jafāfi fī l-qurā l-ḥudūdiyya.
The journalist wrote about the effect of the drought on border villages. (Journalistic.)
كتب المحامي إلى المحكمة بشأن موعد الجلسة المقبلة.
kataba l-muḥāmī ʾilā l-maḥkamati bishaʾni mawʿidi l-jalsati l-muqbila.
The lawyer wrote to the court concerning the date of the next hearing. (Legal/formal.)
4. Write on a surface, in a container, or with an instrument
Arabic chooses a spatial preposition according to how the writing relates to its medium. Use على for an exposed surface—على السبورة، على الغلاف—and في for a document, notebook, form, or field—في الدفتر، في الاستمارة. Instruments and manner commonly use بـ: بالقلم، بالحاسوب، بخط اليد.
كتب المعلم الكلمات الجديدة على السبورة.
kataba l-muʿallimu l-kalimāti l-jadīdata ʿalā s-sabbūra.
The teacher wrote the new words on the board. (Neutral MSA.)
اكتب عنوانك في الخانة الأخيرة بخط واضح.
uktub ʿunwānaka fī l-khānati l-ʾakhīrati bikhaṭṭin wāḍiḥ.
Write your address in the final field in clear handwriting. (Formal instruction to one man.)
Participle, maṣdar, and passive
كَاتِب is both the active participle “writing” and the lexical noun “writer/author”; its regular sound masculine plural is كاتبون/كاتبين, while كُتَّاب is a common broken plural meaning writers/authors. Do not confuse singular كَاتِب with كِتَاب “book.”
مَكْتُوب means “written.” In contemporary formal MSA it is an ordinary adjective—طلب مكتوب “written request.” In some regional varieties it can also mean a letter or fate; those meanings require regional or cultural context and should not silently replace the formal core.
يجب أن يكون الاعتراض مكتوبا وموقعا من صاحب الطلب.
yajibu ʾan yakūna l-iʿtirāḍu maktūban wa-muwaqqaʿan min ṣāḥibi ṭ-ṭalab.
The objection must be written and signed by the applicant. (Administrative.)
The passive كُتِبَ / يُكْتَبُ promotes the text or words written. It is common when authorship is unknown, generic, or deliberately backgrounded.
كتب التقرير بلغة تقنية يصعب على غير المختصين فهمها.
kutiba t-taqrīru bilughatin tiqniyyatin yaṣʿubu ʿalā ghayri l-mukhtaṣṣīna fahmuhā.
The report was written in technical language that non-specialists find difficult to understand. (Formal passive.)
يكتب تاريخ الإنتاج على الجانب السفلي من العبوة.
yuktabu tārīkhu l-ʾintāji ʿalā l-jānibi s-sufliyyi mina l-ʿubwa.
The production date is written on the bottom side of the package. (Formal instruction.)
In Classical and religious language, passive كُتِبَ عَلَى can mean “was prescribed/decreed for.” That use is (Classical/Quranic or elevated) unless a modern legal context clearly supports it; learners should not use it as the default equivalent of ordinary “was written on.”
High-frequency collocations
| Collocation | Meaning and register |
|---|---|
| كَتَبَ رِسَالَةً / تَقْرِيرًا | write a letter/report (neutral) |
| كَتَبَ إِلَى شَخْصٍ | write to someone (neutral/formal) |
| كَتَبَ عَنْ مَوْضُوعٍ | write about a subject (neutral) |
| كَتَبَ بِخَطِّ الْيَدِ | write by hand (neutral) |
| كَاتِبُ الْمَقَالِ | the article's author (formal) |
| طَلَبٌ مَكْتُوبٌ | written request (administrative) |
Common Mistakes
Making the recipient a direct object
❌ كتبت المدير لأطلب موعدا.
Incorrect for ‘I wrote to the director’—the addressee follows إلى.
✅ كتبت إلى المدير لأطلب موعدا.
katabtu ʾilā l-mudīri liʾaṭluba mawʿidan.
I wrote to the director to request an appointment.
Using إلى for the topic instead of the recipient
❌ كتب الباحث إلى تلوث المياه في القرى.
Incorrect for ‘wrote about water pollution’—a topic follows عن, while إلى marks an addressee.
✅ كتب الباحث عن تلوث المياه في القرى.
kataba l-bāḥithu ʿan talawwuthi l-miyāhi fī l-qurā.
The researcher wrote about water pollution in the villages.
Guessing the wrong imperfect vowel
❌ يكتب المحرر الآن.
yaktibu
Incorrect pronunciation—the imperfect is yaktubu, with u after t.
✅ يكتب المحرر عنوانا جديدا للمقال.
yaktubu l-muḥarriru ʿunwānan jadīdan lil-maqāl.
The editor is writing a new headline for the article.
Confusing writer and book
❌ قابلت الكتاب بعد المحاضرة.
Incorrect for ‘I met the writer’—كتاب means ‘book’; the human noun is كاتب.
✅ قابلت الكاتب بعد المحاضرة.
qābaltu l-kātiba baʿda l-muḥāḍara.
I met the writer after the lecture.
Key Takeaways
- Memorize كَتَبَ — يَكْتُبُ — اُكْتُبْ — كِتَابَة; the sound root remains stable.
- The written text is a direct object: كتب رسالة. The addressee follows إلى: كتب إلى المدير.
- Use عن for a topic, على for a surface, في for a document or field, and بـ for an instrument or manner.
- كَاتِب is a writer, مَكْتُوب is written, and passive كُتِبَ / يُكْتَبُ backgrounds the author.
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