diin

1. Past Action Focus
When asking where an action took place in the past, diin is the standard grammatical choice. Because the action is completed, the verb that follows should be in the started aspect (using prefixes like ni- / mi-, nag-, or gi-). This forms a traditional contrast among three words for where: diin for past actions or origin, asa for future actions or destination, and hain for present location of objects or people, as well as present/ongoing actions.

2. Asking for Origin
Diin is the most common word for asking where someone or something came from. It is usually paired with the word gikan (from), as in 'Diin ka gikan?' (Where did you come from?). Additionally, by adding the prefix taga-, you form taga-diin to ask about someone's hometown or nationality (e.g., 'Taga-diin ka?' meaning 'Where are you from?'). Note that in everyday modern speech, taga-asa is highly common as an alternative to taga-diin, and asa is widely used colloquially as a universal catch-all 'where' that replaces both diin for past actions and hain for present locations.

3. Relative Pronoun Usage
Beyond questions, diin is used in statements as a relative pronoun meaning 'where' (equivalent to ang dapit diin). It connects a noun representing a place to a clause describing what happened there, such as in 'ang balay diin ako nagpuyo' (the house where I lived). While common in formal writing or news, everyday spoken Cebuano prefers using the linker "nga" with a locative-focus verb, such as "ang balay nga akong gipuy-an" (the house that I lived in).

4. Sentence Structure
The typical word order for questions is:
Diin + (optional man) + Pronoun + Verb.
Example: Diin man sila nangaon? (Where did they eat?) Diin man nimo gipalit ang sapatos? (Where did you buy the shoes?)
Note that the case of the actor pronoun changes based on verb focus: use an absolutive pronoun (e.g., ka, sila) for actor-focus verbs, and an ergative pronoun (e.g., nimo, nila) for object-focus verbs.

5. Regional Variation
In some dialects, you may hear dis-a used in place of diin, though diin is understood throughout the Cebuano-speaking world.