I have heard that F1 will become void once you apply for AOS. So if you are worried about your I-140 do not apply I-485 for her until the approval of I-140. You can apply for yourself and still maintain your H1. Let her continue on F1 visa. Later depending upon the situation you can apply for H4 or I-485.IPC302 said:after filing 485 for yourself if u still have H1 and that u r maintaining your H1 (i.e not using EAD card) u can file H4 for your wife .
Infact why do u want to change your wife status to H4 .... Just file 485 for her too and let her use EAD and AP and her status will change to AOS pending .
If you are scared that ur 485 might be rejected for some reason then u atleast maintain your status as H1 till u get the greencard.