It is important to analyze the lexicological-phonological processes of the present stem in order to evaluate the generative capacity of each phonological process. The present article aims to identify and describe the lexicological-phonological processes in simple verbs with the initial vowel of standard Farsi after adding the continuous prefix / mi/. The research method is descriptive-analytical. In this research, in the method of data collection, there are 50 verbs out of 323 verbal roots based on Tabataba'i (1997), Dehkhoda Dictionary (2011), and Sokhan Dictionary (2003) which begin with vowels. The data have been transcribed according to the International Phonetic Alphabet "I.P.A" and then analyzed in the framework of generative phonological theory. Results show that in written or formal Farsi, "Hamza" or the glottal stop [ʔ] is added to verbs that begin with vowel and for this reason, they begin with "A"; but after adding the continuous prefix / mi- /, "Hamza" is not inserted in the spoken or informal Farsi and instead, the front vowel shortening process, raising /i/ and gliding as short vowel sequence and gliding [-ej-] and then raising the front central vowel [e] before gliding [j] as vowel sequence and glide [-ij-] are observed. In such structures, in the informal speech, there is no "Hamza" or the glottal stop [ʔ] in the verb structure.