Знал бы сем что случилось в его отс

Знал бы сем что случилось в его отсутствие он не возвращался бы в таком хорошем настроении.

Results (English) 1:

CEM would know what had happened in his absence, he did not return would be in such a good mood.

Results (English) 2:

He would know that these things happened in his absence, he did not return would be in such a good mood.

Results (English) 3:

to know that what happened in his absence, he was back in a good mood.