Chevrolet: car wont start, 2003 chevy cavalier, chevy cavalier

Question
My wife has a 2003 chevy cavalier we drove it 30 miles to our local wal mart did our shopping and drove it 30 miles home. it stayed parked for about half an hour when i went to start it it would not start it would turn over and try to ideal but would die out right away if i feathered the pedal in and out it would try but not catch like it was being starved for fuel. it has been below zero here for about the past two weeks and my wife said that it hard starts in the morning when she goes to work but has never not started. any help will be a blessing  

Answer
Jonathan;
Hi wow thats cold, It might be the intake or the fuel filter, or it could also be from the cold or water in the fuel. I would   throw  two cans of dry gas into the gas tank  and you can spray some starting fluid into the intake and see if it will start up, but if it is that cold you should keep dry gas in the fuel all the time.