1993 volvo 760 getting gas and spark,but still wont start.

Its easy enough to check for spark but how are you checking that you are really getting gas. Are the spark plugs new. If so the check that you have the right ones. It is not uncommon for a parts guy to give you the wrong plugs . If the plugs are not new and the car was running fine with those plugs before all this happened and the plugs look fine now, no bad, black carbon deposits then lets move on . Did you just put gas in the car. sometimes you can get a load of bad gas, I mean water in the gas when I say bad. Been lots of rain lately and this does happen. Pull the plugs on the car and spray some starter fluid down the cylenders. Replace the plugs and turn the engine over. If it fire up for a second or two and then quits, I would start looking at the fuel system. The fuel solinoid relay, which would supply power to the fuel pump could be a problem. Be sure you are getting fuel in the cylenders.