Engined stalled. I replaced all spark plugs and car won't start. It tries to start but won't turn over. Please help!

 

Your description is confusing, "turn over" means it spins, is the engine/starter not "cranking"

 

I think the engine is turning over. 'Tries to start' may mean it fires on some cylinders. This could be a fuel pump failure.

Now to 'engine stalled' Had it been running, was warmed up and it just suddenly quit? Or it started and quit immediately?

As JTsmks says, we don't understand your information.