Verb Construction in Persian Language

In the Persian language grammar resources, there are disagreements about the matters such as construction of verb from infinitive or infinitive from verb, dividing the verbs into regular and regular verbs, the number of past morphemes, and originality of phonemes "t" or "d" at the end of the present stems; and even sometimes there are "negligence" in the categorization of causative, prayer and imperative verbs as the regular or irregular verbs.  In this article, the views of the syntax authors are criticized through studying the grammar books and articles, and after concluding in each case, a relatively new classification of the construction of the verb is presented under the new titles as follows: "1. Regular verbs;    2. pseudo-regular verbs; 3. Irregular verbs; 3. multi-root verbs". Other major results are as follows: the past stem is constructed during the initial construction of the present; and infinitive is constructed from the past tense of the verb, but after the emergence of infinitive, the stems are usually recited and recalled on the basis of the infinitive. Out of the last two phonemes of the past stem, the originality is with the phoneme “t” and frequency prevalence is with the phoneme “d”.  Today, there are eight past morphemes in Persian language:  -d, -ad, -id, -t, -st, -est, -ist, -oft, Regular verbs include pseudo-verbs, causatives, prayers and imperatives, and a few other delicate points.