Identify the tense used in the sentence "I live in Chiang Mai."

The tense used in the sentence "I live in Chiang Mai" is the Present Simple tense. This tense is typically employed to describe facts, habits, or general truths. In this case, the sentence indicates a current and ongoing action or state, indicating where the speaker resides.

The Present Simple is characterized by its use of the base form of the verb, which in this instance is "live." It does not involve any auxiliary verbs or additional components that would signify a different tense, such as completed actions or future intentions. The straightforward nature of stating a current condition is the hallmark of Present Simple tense constructions, making it suitable for describing routines or habitual actions as well.

In summary, the sentence clearly communicates that the speaker's residence in Chiang Mai is a present fact, embodying the typical usage of the Present Simple tense.