A family of Microsoft word processing software products for creating web, email, and print documents.
First, if you want a file in pdf format that works as a fillable form, you are going to do this in a pdf editing program like Adobe Acrobat.
The file from Word in pdf format will simply be like a picture of the document.
Fields and Content Controls in Word are different things. (Jargon)
Shading is handled in very different ways.
Why a sample file is important for troubleshooting - - - - - - - and how to do it.