Если бы он не работал днем, он бы б

Если бы он не работал днем, он бы больше занимался.

Результаты (английский) 1:

If he had not worked during the day, he'd be more engaged.

Результаты (английский) 2:

If he had not worked during the day, it would be more engaged.

Результаты (английский) 3:

if he hadn't worked during the day, he would have done.