In the monograph the derivative of homogeneous sentences, which existed in the Uzbek language during the years of independence and denoting one of its peculiarities is studied. The derivative "A middle third", its meaning, relationship with other derivatives and the proof of it occurrence will awaken an interest in the future linguists, Masters of Art and those who deal with scientific works. The existence of the homogeneous sentence in our language was grounded and proven in the period of independence. It comes in simple, composite sentences and texts, and it enables the writers and poets to describe the colourfulness and richness of our mother language. The monograph is aimed for those who are interested in the question of the native language, Masters of Art and for those who deal with scientific works.