How can I translate these conditional sentences?

Question

- If I weren't going on my business trip next week, I would have accepted that new assignment at work.(I'm wondering especially about how to translate "weren't going", because in English we're using present continuous with a future meaning). - If I weren't going to be busy tomorrow... - I'm not going to the concert tonight, but if I were going...

Answer 1

Se non stessi andando al mio viaggio di lavoro la prossima settimana, avrei accettato quel nuovo incarico