Rule

Rule

Examples

cancel - cancelling benefit - benefitted

mud - muddy big - bigger

Double the end consonant if the word ends in a short vowel-consonant combination

cute - cutest manipulate - manipulating

subordinate - subordination adore - adorable

Drop the silent -e when adding a suffix that begins with a vowel

advantage - advantageous

notice - noticeable see - seeing

Keep the silent -e when words end in -ce, -ge, or -ee, even when adding a suffix that begins with a vowel

unify - unification voluntary - voluntarily

vary - variable priority - prioritize

If a word ends in a consonant-y, change the y to an i

display - displayed rely - relying

Is the word ends in vowel-y, or the suffix starts with an i, keep the y (less common)