What is Form I in Arabic?

Form I (also written Form 1 or the fa'ala pattern) is the basic, underived verb pattern built directly on a three-consonant root. The nine other major forms add prefixes, doubled consonants, or long vowels to derive related meanings like causative or reflexive, but Form I is the foundation taught first.

Why does Arabic have dual forms?

Arabic grammatically distinguishes exactly two from three-or-more, so alongside singular and plural it has a dual number used for pairs. Verbs therefore have separate dual conjugations in the second and third persons, which this table includes.

How do the perfect and imperfect tenses differ?

The perfect (past) tense is built with suffixes only on the root vowel pattern fa'al-, as in katab-tu 'I wrote'. The imperfect (present/future) uses a set of prefixes (a-, ta-, ya-, na-) plus sometimes suffixes around the stem -ktub-, as in a-ktub-u 'I write'.

Does Arabic mark gender on verbs?

Yes. From the second person onward Arabic distinguishes masculine and feminine, including in the plural and dual. The first person (I, we) is the only person that does not mark gender. This is why the table has separate masculine and feminine rows.

What are the imperfect stem vowels?

Form I imperfect verbs take one of three stem vowels (a, i, or u) that is not predictable from the root and must be memorized per verb. This tool defaults to u for illustration; substitute the correct stem vowel for your specific verb when you know it.

What is the Arabic Verb Conjugation Reference?

Generates a full conjugation table for an Arabic Form I (fa'ala) triliteral root in the perfect (past) and imperfect (present) tenses across all persons, genders, and numbers, using the standard prefix and suffix paradigm. It runs free in your browser on Gera Tools, with nothing uploaded.

Arabic Verb Conjugation Reference

Name: Arabic Verb Conjugation Reference
Creator: Gera Tools
License: https://creativecommons.org/licenses/by/4.0/

Arabic conjugates its verbs by mapping a three-consonant root onto fixed templates. Form I — the basic fa’ala pattern — is the starting point. This tool takes the three root letters and builds the complete paradigm for the perfect (past) and imperfect (present) tenses across every person, gender, and number, including the dual.

How it works

Write the root as three consonants C1-C2-C3 (for kataba, “to write”, that is k-t-b). The two tenses use different machinery:

perfect (past):     C1aC2aC3 + personal SUFFIX        (katab-tu = I wrote)
imperfect (present): PREFIX + C1C2uC3 + personal suffix (a-ktub-u = I write)

The perfect uses suffixes only. The imperfect uses a prefix (a- 1sg, na- 1pl, ta- 2nd and 3fsg, ya- 3rd) plus, in the duals and plurals, an additional suffix. Arabic marks gender from the second person onward and has a distinct dual for pairs, giving thirteen cells in the full paradigm. The imperfect stem vowel (the vowel on C2) is lexically fixed per verb — a, i, or u — and must be learned individually; this tool illustrates with u.

The full thirteen-cell paradigm

Arabic’s conjugation system is richer than most European languages because it combines three numbers (singular, dual, plural) with gender marking from the second person onward. The result is thirteen distinct forms per tense:

Person	Number	Gender	Perfect suffix	Imperfect prefix+suffix
1st	Singular	—	-tu	a-…-u
1st	Plural	—	-naa	na-…-u
2nd	Singular	Masc	-ta	ta-…-u
2nd	Singular	Fem	-ti	ta-…-iina
2nd	Dual	Masc/Fem	-tumaa	ta-…-aani
2nd	Plural	Masc	-tum	ta-…-uuna
2nd	Plural	Fem	-tunna	ta-…-na
3rd	Singular	Masc	-a	ya-…-u
3rd	Singular	Fem	-at	ta-…-u
3rd	Dual	Masc	-aa	ya-…-aani
3rd	Dual	Fem	-ataa	ta-…-aani
3rd	Plural	Masc	-uu	ya-…-uuna
3rd	Plural	Fem	-na	ya-…-na

Worked example for k-t-b (to write)

Perfect tense (past):

I wrote: كَتَبْتُ (katabtu)
She wrote: كَتَبَتْ (katabat)
They (m. pl.) wrote: كَتَبُوا (katabuu)
The two of them (m.) wrote: كَتَبَا (katabaa)

Imperfect tense (present/future):

I write/will write: أَكْتُبُ (aktubu)
You (f. sg.) write: تَكْتُبِينَ (taktubiina)
He writes: يَكْتُبُ (yaktubu)
They (m. pl.) write: يَكْتُبُونَ (yaktubuuna)

The imperfect stem vowel

The vowel on the second root consonant in the imperfect (C2) is not predictable from the root and must be memorised per verb. The three possibilities:

u vowel: كَتَبَ → يَكْتُبُ (kataba → yaktubu, “to write”)
i vowel: جَلَسَ → يَجْلِسُ (jalasa → yajlisu, “to sit”)
a vowel: ذَهَبَ → يَذْهَبُ (dhahaba → yadh-habu, “to go”)

This tool defaults to the u vowel for illustration. Substitute the correct vowel for your specific verb before using the forms in writing or speech.

What this paradigm does not cover

This tool models sound (saliim) triliteral roots — roots where all three consonants are genuine consonants and none is a hamza, waw, or ya. The weak roots (roots containing waw or ya) and the doubled root (where C2 = C3) follow modified patterns and are not represented here. For common weak verbs like قَالَ (qaala, “to say”) or كَانَ (kaana, “to be”), consult a dedicated reference for defective/hollow verb conjugation.