Reference

i before e

1. i before e (believe)
2. except c (receive)
3. except when sounded like a
4. except neighbor
5. except weight

slient e

1. drop e if ending begins with vowels (use->us-able)

y

1. consonant before y, change y to i (e.g. flies)
2. vowel before y, keep y

Double consonant

1. vowel + consonant ending (e.g. stopping)

ie+ing => y+ing