Post-Grad Work Permit -> PR Common-law

[wtei]

Hello. I graduated from university and I am currently working with my post-grad work permit which will expire in a few months.
I am applying for a permanent resident because my common-law will sponsor me.
I would like to know how to extend my work permit, and which forms do I have to use. Do I apply for TRV or TRP, or ???? I need to extend it so I can be here in Canada and I don't want to loose my job.
I appreciate all your help!
Wtei