The paper deals with the different uses and meanings of the verb chog ("be allowed", "can", "be ready") in spoken Tibetan. As a modal verb, it is mainly used for expressing permission, and sometimes possibility.
As an aspectual verb, it is used to express preparedness. Chog is discussed from a syntactic and a semantic point of view.
It is also compared to other verbs or verbal endings that have a similar meaning, such as nyan, thub, 'grig, rgyu.byung or rtsis byed.