Car won't start

[tnm27]

hmm...well i have a 91 eclipse GSX. My problem is that the car won't start. i put it away in the garage for the winter time in november. i went to start it last week to see if there is any problems with it but it wouldn't start. it cranked but it just wouldn't start. i switched the battery with a new one since i had a warranty anyways and it started again. today i went to start it and it wouldn't start again. it choked and cranked but nothing. is it due to the cold or alternator? or any thing electrical? anythnig would be helpfull. thanks