1. 能用太太的PD when her PD become current??
-Yes, but you need top call USCIS to do the I-485 relink to your wife's I-140 if your I-485 was filed based on your I-140.
2. I may change job anytime (after 180 days)
-Yes.
3. can my wife change job treat like me still keep filed 485(protected by 180 day rule)?
-Yes.
Thank You!!