Verb conjugation: *k-t-b 'write' — perfect (G-stem)

vocabulary

Only primary orthography(hides romanizations and secondary scripts)

The pan-Semitic root k-t-b 'write' conjugated in the SUFFIX conjugation (perfect / past). The Semitic perfect marks person + gender + number with SUFFIXES only (unlike the imperfect, which uses prefixes). The stem *katab- surfaces almost identically across Central, NW, and Old South Arabian; Akkadian and Ethio-Semitic substitute their own preferred 'write' roots (šaṭāru, ṣ-ḥ-f).
Concept	East Semitic	Northwest Semitic				Central Semitic	South Arabian	Ethio-Semitic			Proto-Semitic
Concept	Akkadian	Ugaritic	Hebrew	Aramaic	Syriac	Arabic	Sabaean	Geʿez	Amharic	Tigrinya	Proto-Semitic
he wrote (3ms)	išṭur (šaṭāru)	𐎋𐎚𐎁 · ktb	כָּתַב · kāṯav	כְּתַב · kəṯav	ܟܼܬܼܒ · kṯaḇ	كتب · kataba	𐩫𐩩𐩨 · ktb	ጸሐፈ · ṣäḥafa (ṣ-ḥ-f)	ጻፈ · ṣafä (ṣ-f)	ጸሐፈ · ṣäḥafä	*kataba
she wrote (3fs)	išṭur (same as 3ms)	𐎋𐎚𐎁𐎚 · ktbt	כָּתְבָה · kāṯəvāh	כִּתְבַת · kiṯbaṯ	ܟܼܬܼܒܼܬ · kiṯḇaṯ	كتبت · katabat	𐩫𐩩𐩨𐩩 · ktbt	ጸሐፈት · ṣäḥafat	ጻፈች · ṣafäččə	ጸሐፈት · ṣäḥafät	*katabat
you wrote (2ms)	tašṭur	𐎋𐎚𐎁𐎚 · ktbt	כָּתַבְתָּ · kāṯavtā	כְּתַבְתְּ · kəṯavt	ܟܼܬܼܒܼܬ · kṯaḇt	كتبت · katabta	𐩫𐩩𐩨𐩫 · ktbk	ጸሐፍከ · ṣäḥafka	ጻፍክ · ṣafk	ጸሐፍካ · ṣäḥafka	*katabta
I wrote (1cs)	ašṭur	𐎋𐎚𐎁𐎚 · ktbt	כָּתַבְתִּי · kāṯavtī	כִּתְבֵית · kiṯvēṯ	ܟܼܬܼܒܼܬ · kiṯḇeṯ	كتبت · katabtu	𐩫𐩩𐩨𐩫 · ktbk	ጸሐፍኩ · ṣäḥafku	ጻፍኩ · ṣafku	ጸሐፍኩ · ṣäḥafku	*katabtu
they wrote (3mp)	išṭurū	𐎋𐎚𐎁𐎜 · ktbw	כָּתְבוּ · kāṯəvū	כְּתַבוּ · kəṯavū	ܟܼܬܼܒܼܘ · kṯaḇw	كتبوا · katabū	𐩫𐩩𐩨𐩥 · ktbw	ጸሐፉ · ṣäḥafu	ጻፉ · ṣafu	ጸሐፉ · ṣäḥafu	*katabū
we wrote (1cp)	nišṭur	𐎋𐎚𐎁𐎐 · ktbn	כָּתַבְנוּ · kāṯavnū	כְּתַבְנָא · kəṯavnā	ܟܼܬܼܒܼܢ · kṯaḇn	كتبنا · katabnā	𐩫𐩩𐩨𐩬 · ktbn	ጸሐፍነ · ṣäḥafna	ጻፍን · ṣafnä	ጸሐፍና · ṣäḥafna	*katabnā