This study examines the grammatical characteristics of inactive verbs, also known as imperfect verbs, observed in Japanese honorific expressions. Kaneda et al.(2014) has a verb’s characteristic of ‘おいで(御出で)’ ‘ご存じ’ ‘お帰り’ ‘お買い’, which receives the formula of the organization modifier, but unlike other verbs, They are defined as ‘incomplete verbs’ or ‘non-conjugated verbs’ in that they are used only in the formed form. However, conflicting views are also presented regarding ‘おいで’ and ‘お帰り’, which say that they should be treated as nouns in that they are both continuous modifiers and empty words. However, this view cannot erase the impression that it is a contradictory claim in that it defines the same word as two parts of speech. This is consistent with the fact that the continuous adjective below, which has been transformed into a noun in its original form, is not defined as a verb. Accordingly, in this paper, we point out that the appearance of such imperfect verbs is possible only within a specific syntactic environment, that is, within an honorific expression, while also trying to reveal the syntactic environment for the formation of imperfect verbs through comparative analysis with continuous adjectives.