What Strings Are Not Compound Verbs?

According to the principles of dependency grammar, verbs are the central constituents in the structure of sentence, for they determine what complements are or can be used in it. The question is what lexical categories should be entered in a dictionary as verbs? This distinction becomes much more crucial when compound verbs are involved, especially in the Persian language in which compound verbs are abound and their exact definition is open to argument. Two Iranian grammarians, Mohammad Dabir Moqaddam and Alaaddin Tabatabai, have, notably, dealt with the issue. Dabir Moqaddam maintains that the process of forming a compound verb is twofold, compounding and incorporation. Now, one way of approaching the issue is to reverse the question and ask what strings are not to be taken as compound verbs.