Perfect-Tense Endings: Regular Verbs | Arabic (Modern Standard) Grammar

The Arabic perfect presents an event as complete or bounded. For a regular strong verb, one stable stem combines with suffixes that identify the subject. Thus كَتَبْتُ means “I wrote,” كَتَبَتْ means “she wrote,” and كَتَبُوا means “they wrote.” An independent subject pronoun is usually unnecessary because the ending already carries that information.

This page uses regular Form I كَتَبَ — يَكْتُبُ — كِتَابَةً “write,” root ك-ت-ب. Its three radicals remain visible throughout the perfect. Weak and geminate verbs are mentioned only to show where this regular model stops; their stem changes must be learned from verified principal parts. For the citation form itself, see The Dictionary Form and Root.

Build the perfect from a stem and a suffix

The citation form كَتَبَ is third-person masculine singular: “he wrote.” Before most endings, use the consonantal stem كَتَبْـ katab- and add a suffix. Some third-person forms instead attach their vowel-bearing ending directly to كتب.

Subject	Arabic form	Reading	Core meaning
هو	كَتَبَ	kataba	he wrote
هي	كَتَبَتْ	katabat	she wrote
هما, masculine	كَتَبَا	katabā	the two men wrote
هما, feminine	كَتَبَتَا	katabatā	the two women wrote
هم	كَتَبُوا	katabū	they (m./mixed) wrote
هن	كَتَبْنَ	katabna	they (f.) wrote
أنت	كَتَبْتَ	katabta	you (m.sg.) wrote
أنت	كَتَبْتِ	katabti	you (f.sg.) wrote
أنتما	كَتَبْتُمَا	katabtumā	you two wrote
أنتم	كَتَبْتُمْ	katabtum	you (m./mixed pl.) wrote
أنتن	كَتَبْتُنَّ	katabtunna	you (f.pl.) wrote
أنا	كَتَبْتُ	katabtu	I wrote
نحن	كَتَبْنَا	katabnā	we wrote

Several unvocalized forms look identical. كتبت may represent كَتَبْتُ، كَتَبْتَ، كَتَبْتِ, or كَتَبَتْ. Real sentences, subject nouns, and discourse identify the intended reading.

كتبت إلى الجامعة أمس وسألت عن طلبي.

katabtu ʾilā l-jāmiʿati ʾamsi wa-saʾaltu ʿan ṭalabī.

I wrote to the university yesterday and asked about my application.

كتبت ليلى الملاحظات في دفترها.

katabat laylā l-mulāḥaẓāti fī daftarihā.

Layla wrote the notes in her notebook.

The first ending ـتُ marks first-person singular; the second sentence uses ـتْ for a feminine third-person subject. English uses the same unchanged word wrote, so learners must pay attention to Arabic suffixes rather than wait for an independent pronoun.

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Group the endings by their first sound. The t-series—ـتُ، ـتَ، ـتِ، ـتُمَا، ـتُمْ، ـتُنَّ—covers “I” and all second persons. Then learn the third-person endings and ـنا separately.

Gender and dual number remain visible

Formal MSA maintains a dual. In subject-first order, الطالبان كتبا and الطالبتان كتبتا distinguish masculine and feminine dual subjects.

الطالبان كتبا التقرير في المكتبة.

aṭ-ṭālibāni katabā t-taqrīra fī l-maktaba(h).

The two male students wrote the report in the library.

الطالبتان كتبتا التقرير في المختبر.

aṭ-ṭālibatāni katabatā t-taqrīra fī l-mukhtabar.

The two female students wrote the report in the laboratory.

Feminine plural ـنَ is also distinct from masculine/mixed ـوا in subject-first clauses.

الموظفات كتبن الردود قبل نهاية الدوام.

al-muwaẓẓafātu katabna r-rudūda qabla nihāyati d-dawām.

The female employees wrote the replies before the end of the workday.

الموظفون كتبوا الردود قبل نهاية الدوام.

al-muwaẓẓafūna katabū r-rudūda qabla nihāyati d-dawām.

The employees wrote the replies before the end of the workday.

The distinction is grammatical in (formal) MSA. Many regional spoken varieties reorganize dual and feminine-plural agreement (regional), but those systems should not be substituted into a formal MSA paradigm.

Perfect meaning is bounded, not simply “English past”

The perfect commonly reports a completed past event, especially with a time expression such as أمس or صباح اليوم.

وصل القطار في موعده صباح اليوم.

waṣala l-qiṭāru fī mawʿidihi ṣabāḥa l-yawm.

The train arrived on time this morning.

With لقد, English often prefers a present-perfect translation because a completed event matters now.

لقد أرسلت النسخة النهائية إلى العميل.

laqad ʾarsaltu n-nuskhata n-nihāʾiyyata ʾilā l-ʿamīl.

I have sent the final version to the client.

The perfect can even refer to an event future relative to speech in a condition or time clause. The event is viewed as a completed boundary before the next instruction, not asserted as past.

إذا وصلت الحافلة، اتصل بي فورا.

ʾidhā waṣalati l-ḥāfilatu, ʾittaṣil bī fawran.

When the bus arrives, call me immediately.

There is therefore no accurate equation “perfect = English simple past.” The perfect contributes a bounded viewpoint; particles, time expressions, and clause type locate that event.

Perfect and imperfect present different viewpoints

Compare completed كتب with ongoing or habitual يكتب. The lexical verb remains كَتَبَ — يَكْتُبُ, but the speaker chooses a different stem system.

كتب نادر الفصل الأول أمس، ويكتب الفصل الثاني الآن.

kataba nādirun l-faṣla l-ʾawwala ʾamsi, wa-yaktubu l-faṣla th-thāniya l-ʾān.

Nader wrote the first chapter yesterday and is writing the second now.

Mood belongs to the imperfect, not the perfect. لم يكتبْ uses a jussive imperfect after لم to negate a past event; ما كتبَ negates a perfect. Do not put لم or لن directly before a perfect form.

ما كتب نادر الرد، ولم يرسله إلى الشركة.

mā kataba nādirun r-radda, wa-lam yursilhu ʾilā sh-sharika(h).

Nader did not write the reply and did not send it to the company.

Word order affects agreement

When a plural subject comes first, use full plural agreement: الطلاب كتبوا. In neutral verb-first order, the preceding verb is normally singular: كتب الطلاب. The subject is still semantically plural; the syntax limits agreement on the verb.

كتب الطلاب أسئلتهم على بطاقات صغيرة.

kataba ṭ-ṭullābu ʾasʾilatahum ʿalā biṭāqātin ṣaghīra(h).

The students wrote their questions on small cards. (Verb-first.)

الطلاب كتبوا أسئلتهم على بطاقات صغيرة.

aṭ-ṭullābu katabū ʾasʾilatahum ʿalā biṭāqātin ṣaghīra(h).

The students wrote their questions on small cards. (Subject-first.)

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Before choosing a plural or dual ending, locate the overt subject. Full agreement is expected when it precedes the verb; a preceding verb in neutral VSO is normally singular.

Where the regular model stops

Strong regular كتب keeps stem katab- before ـتُ and ـنا: كتبتُ، كتبنا. Hollow قَالَ — يَقُولُ — قَوْلًا instead shortens before those suffixes: قُلْتُ، قُلْنَا. Geminate مَدَّ — يَمُدُّ — مَدًّا unfolds before them: مَدَدْتُ، مَدَدْنَا.

قلت للمدير إننا مددنا المهلة يوما.

qultu lil-mudīri ʾinnanā madadnā l-muhlata yawman.

I told the director that we had extended the deadline by one day.

These are not random exceptions, but they do not follow the regular katab- + suffix procedure. Learn each irregular class through its attested principal parts rather than altering a regular table by guesswork.

Common Mistakes

Treating the perfect as a mechanical English past

❌ يكتب خالد التقرير أمس.

Incorrect for a completed event yesterday — an ungoverned imperfect is not selected merely because English uses one unchanged past form.

✅ كتب خالد التقرير أمس.

kataba khālidun t-taqrīra ʾams.

Khaled wrote the report yesterday.

Losing feminine agreement

❌ الطالبة كتب الملخص.

Incorrect — a preceding feminine singular subject requires كتبت.

✅ الطالبة كتبت الملخص.

aṭ-ṭālibatu katabati l-mulakhkhaṣ.

The female student wrote the summary.

Replacing the dual with a plural ending

❌ الطالبان كتبوا التقرير.

Incorrect — a subject-first masculine dual requires كتبا.

✅ الطالبان كتبا التقرير.

aṭ-ṭālibāni katabā t-taqrīr.

The two students wrote the report.

Using full plural agreement before an overt VSO subject

❌ كتبوا الموظفون الرد.

Incorrect as neutral VSO — use singular كتب before the overt plural subject.

✅ كتب الموظفون الرد.

kataba l-muwaẓẓafūna r-radd.

The employees wrote the reply.

Putting a perfect after a mood governor

❌ لن كتب المدير القرار اليوم.

Incorrect — lan governs a subjunctive imperfect, not a perfect.

✅ لن يكتب المدير القرار اليوم.

lan yaktuba l-mudīru l-qarāra l-yawm.

The director will not write the decision today.

Regularizing weak and geminate stems

❌ قالنا إننا مدنا المهلة.

Incorrect — the attested forms are قلنا and مددنا, not regularized forms built on قال and مد.

✅ قلنا إننا مددنا المهلة.

qulnā ʾinnanā madadnā l-muhla(h).

We said that we had extended the deadline.

Key Takeaways

Regular perfect verbs combine a stable stem such as katab- with subject suffixes.
The ending identifies person, number, and gender, so an independent pronoun is usually unnecessary.
The perfect presents an event as bounded; context may yield English past, present-perfect, or future-time translations.
Subject-first clauses show full agreement, while neutral verb-first clauses normally use a singular verb before an overt plural or dual subject.
Mood governors select imperfect forms; they do not alter or directly govern the perfect.
Weak and geminate verbs require their own verified stem changes and must not be forced into the regular table.

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