Good question. In Arabic we only have three tenses: (الحاضر, الماضي, المستقبل). Anything happened before the present moment is الماضي no matter how long the action took or how many times it has happened. And anything will happen after the present moment is المستقبل no matter if it will happen moments or decades later.

Boudy Soliman Obaide, thank you so much for your answer. But I mean a little bit different. I know it is "he was doing" . My question was about ... Does this verb form has some title in arabic, for eaxample, like المضارع - we call past tense , الماضي - we call present tense . Do we call somehow these type verbs in arabic?

was doing