1. If the employee hadn't left at that time, what would have happen to our company? (The employee left at that time, 3 years have passed by since then.) 2. If he hadn't leave Korea last week, could he have attended Jane's wedding ceremony today? (He left Korea last week. He couldn't attend Jane's wedding ceremony today.) 3. If he hadn't leave Korea last week, obviously he would have attended her wedding ceremony tomorrow. (He left Korea last week. He won't attend her wedding ceremony tomorrow.) Do these look natural? Thanks in advance!