The article discusses the adverbial participle’ forms used in the articles of the almanac “Mir'at". The Mir'at almanac (Mirror) began publishing in Saint Petersburg from 1900 to 1903, and the last six issues were published in Kazan between 1903 and 1909. A total of 22 issues were published. Articles published in the first issue of the almanac “Mir'at”(1900) were selected for analysis. The language of the almanac “Mir'at” actively uses adverbial participles ending in -yp/-ep and -gach/- gech. A negative adverbial participle has ending in –yp is transmitted by form ending in –mayencha/-meyenche. Adverbial participle ending in –ganchy and –yshlyy in considered issue was not revealed. Along with Tatar-Turkic adverbial forms (-yp/-ep, -gach/- gach endings), grammatical forms of Turkic-Oguz origin (-Arak/- Arak and –(y)rken) were also actively used, confirming the active influence of the Ottoman-Turkish language on the Tatar literary language in the early twentieth century.Keywords: linguistics, adverbial participle, Tatar language, the beginning of the twentieth century, “ Mir'at”, grammatical features.