If the starter turns the engine, the battery and starter are fine,
That leaves fuel spark, and compression
You have gas in the tank
take the plug wire lose from one plug,, hold it next to the valve cover, and crank the engine
If you get a spark, the problem is in the fuel or compression..
check the fuel filter, pump, and injector...
If you get spark and fuel that leaves compression, which would probably mean, a slipped timing chain...
my guess would be fuel filter plugged, or a bad cap and rotor.....