Doubt about functional requirements

Hi there, im not sure if this is the correct place to ask this question but im a uni student in software engineering and throughout this year and a half ive been in my university no one has taught us how to redact a functional requirement or the correct structure of it. Some of our professors tell us to include a priority list, other tell us to include acceptance criteria, etc. I wonder what is the correct way to redact the non functional and functional requirements