According to the syntactic approach of PerDT, some word sequences like ""(promise + to give) to promise and ""(allow + to give) to allow have been considered to have the above-mentioned structure in which the words "" and "" are the objects of the simple verb "" not the non-verbal elements of the complex predicate ""or ""; more clearly the above word sequences are not considered as complex predicates and considered just as a combination of a noun (with the syntactic role object) and a simple verb.
since in PerPB every event or action with inflectional properties of the verbs in the Persian is treated as the verb, the previously mentioned sequences are considered individual verbs.