Here's why:
* Short vowel sounds are typically pronounced quickly and with a closed mouth. They are often found in words with one syllable.
* Long vowel sounds are typically pronounced slowly and with an open mouth. They are often found in words with two syllables or words that have a silent "e" at the end.
The "i" in "wing" is pronounced like the "i" in "pin" or "sit", which is a short vowel sound.