0 Both the antecedent and the consequent are past actions, so I'd say:02br 02br 00 «If I had known he wasn't coming to the lesson I would have gone home earlier»02br 02br 00 EDIT: And Welcome to the forum! 0-
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01cite10optilang12cite10If I was using this sentence the day after I would say - "If I had known he wasn't coming to the lesson I would have gone home early"12blockquote10I think you can use that sentence even if you have yet to go home, that same day. Or you could also just use "would", or just "could"... whatever you want