Possible to file I-485 while H1B extension pending?

[gcholdertobemt]

My H1B extension has been pending for more than 6 months at Vermont. We filed Premium Processing. They said it's delayed due to the security checks.

I have a package ready to file I-485.

Is it possible to file the I-485 while my H1B is still pending?

Please tell me.

Thanks!