Simple lesson, the long and the short of it.

If it's a long vowel with one consonant, and followed by an " e ",

the magic " e ", drop the " e " and add on your ending ;

i n g, e d, just add it right on.

If it's a short vowel sound with one consonant,

double the consonant, then add on your ending.

This doubling of the consonant tells us it's a short sound so we know how to speak.

So not only did I teach you spelling, you got pronunciation.