The article analyzes the phonological and morphological changes that occur in Arabic verbs, in particular, the process of word inflection. Based on the work of Muhammad al-Muizzi "Tasrif al-Afal", the types of assimilation, its conditions and manifestations in the verses of the Koran are explained.

sarf (morphology), nahw (syntax), verb, assimilation, izhar, qalb, hazf, idgham, Muhammad al-Muizzi.

Abdou Al-Rajihi. (2008). Arabic dialects in Quranic recitations. Al-Lahajaat al-arabiyya fiy al-qira'at al-Qur'aniyya. Amman: Dar al-Masiyra. – 238 p. (in Arabic)

Abou Ishaq Al-Sirriy Al-Zajjaj. (2005). Meanings and Syntax of the Qur’an. Edited by Abdul Jalil Abdo Shalabi. Ma'ani al-Qur'an wa I'raabuhu. Tahqiq Abdul Jalil Abdo Shalabi. Cairo: Dar al-Hadith . – 500 p. (in Arabic)

Abu Ja'far An- Nahhas. (1988). Quranic grammar. I'rab al-Qur'an (المجلد 4). Beyrut: Alam al-kutub . – 476 p. (in Arabic)

Akhfash. al-Avsat. (1990). Meanings of the Qur’an. Edited by Dr. Hoda Mahmoud Qara’a. Ma'ani al-Qur'an. Tahqiq d. Hoda Mahmoud Qara’a. Cairo: Al-Khanji library. – 846 p. (in Arabic)

Al-Bakkush Al-Tayyib. (1992). Arabic morphology through modern phonology. At-Tasrif al-Arabi min khilal ilm al-Aswaat al-Hadith. Tunisia: Al-Matbaa al-arabiyya. – 198 p. (in Arabic)

Al-Farro' Abou Zakariyya. (2002). Meanings of the Qur’an. Edited by Youssef Nagati. Ma'ani al-Qur'an. Tahqiq Youssuf Nagati (المجلد 1). Cairo: Dar al-Kutub al-Misriyya. – 510 p. (in Arabic)

Ali al-Sayyid Ameen. (1972). In Morphology. Fiy I'lmi al-Sarf. Cairo: Dar al-Ma'arif. – 110 p. (in Arabic)

Anis, I. (withaout date). Linguistic sounds. al-Aswat al-Lughawiyya. Cairo: Nahdet Misr Library. – 204 p. (in Arabic)

Grande, B. (1998). Course of Arabic grammar in comparative-historical light. Kurs arabskoy grammatiki v sravnitel'no-istoricheskom osveshenii. Moscow: RAN. – 585 p. (in Russian)

Jamolxonov, H. (2009). Theoretical grammar of the Uzbek language. O‘zbek tilining nazariy grammatikasi. Tashkent: “Fan”. – 224 p. (in Uzbek)

Yusuf Abu Hayyan Hamad. (2010). The ocean. Al-Bahr al-muheet. Beyrut: Dar al-kutub al-ilmiyya. – 520 p. (in Arabic)