My work permit expired last week but i filed for a renewal in november....can i still work?

It depends on what the basis for your work authorization is. But in most cases the answer is no, you cannot work until you get a new EAD.

It depends what type of work permit you have. If it is an Employment Authorization Document, you have to stop working until your receive a new EAD. On the other hand, if it is a temporary work status like an H-1B, you may continue to work while your extension of stay remains pending.

I'm going to assume that by "work permit" you mean an EAD - Employment Authorization Document. If that is so, then the answer is a catagorical "NO". On the other hand, you mean an employment authorized nonimmigrant visa, then the answer is you can keep working so long as you file the expension petition before it expires.