What tense is used in "We have been living in Mumbai for one month."?

The sentence "We have been living in Mumbai for one month" uses the Present Perfect Continuous tense. This tense is formed by using "have" or "has" along with "been" and the present participle of the main verb (in this case, "living"). The Present Perfect Continuous tense is particularly useful for emphasizing the duration of an action that started in the past and is still ongoing or has recently stopped, which is evident in the phrase "for one month."

The use of "for one month" indicates that the action of living in Mumbai began a month ago and continues to the present. This tense highlights both the continuous nature of the action and its relevance to the current moment, making it clear that the experience of living in Mumbai is not just a past occurrence but an ongoing situation.