Actually, the wording wouldn't be "why can not you get me some ice cream". It would be "why can you not get me some ice cream". Just because a contraction is used does not mean that the word and not are next to each other.
Three things: I wish I had a teacher that taught Morse Code Those kids are geniuses Tests are about demonstrating what you've learned in class. Those kids should not have been punished for using Morse Code when their teacher taught it to them