Intensive Outpatient Treatment (also known as IOP for Intensive Outpatient Program) is a primary treatment program recommended in some circumstances by a clinical and medical assessment. IOP may be recommended for those who do not need medically-supervised detox.
The genitive is the case (or function) of an inflected form of a noun or pronoun showing ownership, measurement, association, or source. Adjective: genitival. The suffix -'s on nouns is a marker of genitive case in English. Genitive case can also be indicated by an of phrase after a noun.
Infinitives. An infinitive is a verbal consisting of the word to plus a verb (in its simplest stem form) and functioning as a noun, adjective, or adverb. The term verbal indicates that an infinitive, like the other two kinds of verbals, is based on a verb and therefore expresses action or a state of being.