Can gas go bad

[Hi anybody I have problems with starting my grand am I am going to change sparks plugs.!992 model and a bought just last yearand it had leak in the wind shield. There was alot of water in the car but I got out and some relief now it trying to start it again please can help with this thank-you
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Yes gas can go bad. It turns to varnish after a while and can gum up fuel filters, injectors, and pumps. Another thing that often happens is it gets contaminated with water which will not allow your car to start. After installing a new set of plugs, put some drygas into your tank and let it sit for a few minutes then try to start the car. Let us know if this works or not, there are alot of other tricks to try.