What verb tense is used for expressing simultaneous activities in the past? present imperfect preterit subjunctive

Tense is the grammatical term that refers to the time when the action of the verb occurs: past, present, future. The time frame of an action is usually established by referring to the present moment; for example, the passé composé and the future are respectively past and future in relation to the present.

Tenses are also described by their number of parts. For example, a tense with only one verb form is called a simple tense (ie, le passé simple). In contrast, a tense comprising two forms, the auxiliary verb and the participle, is referred to as a compound tense (ie, le passé composé).Tense is like a grammatical term that refers to the time when an action of the verb occurs. The past, present, and future. The time frame of an action is usually established to referring to the present. For example: The passé composé and the future are respectively as  past and future and also into the present.
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What u mean