The Imparfait is a French verb tense used to describe ongoing actions or situations in the past. It often conveys background information, habitual actions, or states of being. For example, one might say, "Quand j'étais jeune" (When I was young) to set the scene for a story. To form the Imparfait, take the present tense nous form of a verb, remove the -ons ending, and add the appropriate endings: -ais, -ais, -ait, -ions, -iez, -aient. This tense is commonly used in storytelling, alongside the passé composé, to provide context and detail about past events.