Can I start playing in negative numbers on timeline?

We are recreating sound effects and music for a movie scene in my class. Is it possible to start playing 5 seconds BEFORE zero? I would just add silence or a click track at the beginning, but the timeline is lined up second by second to a movie scene. I need time at the beginning to click play on the movie.

No. Only audio from time=0 onwards can be played.
I’d suggest moving the entire project forward by an easy to work with time (such as 10 seconds).