Car stalled while driving,will not start,cranks but will not turn over

If the engine is turning over and not starting you have to know if you are getting fuel and spark. Turn the key to on and listen for the fuel pump to run. Next see if you are getting spark to the spark plugs. If both of these are present, do you notice if the engine turns faster now then it did before this problem if so you may have a timing belt that jumped time. also scan for codes to see if any cam and crank sensor are in sync. let us know what you find out from these things and we can help more from there.