Suffixing Rules

Drop Silent <e>

100

safe + er =

safer

200

Face + ing = facing

Facing

300

Sub + side + ing =

subsiding

400

Drop silent <e> when the suffix begins with a ....

Vowel 

Change <y> to <i>

100

Joy + ful = 

Joyful

200

Baby + ed =

Babied

300

Spice + y + est =

Spiciest

400

_____ change <y> to <I> except to avoid double ii and when there's a vowel before y. 

Always

Double the Consonant

100

Hop + ed =

hopped

200

Trip + ing =

Tripping 

300

Fog + y + er = 

Foggier

400

Double the last letter if the one syllable base ends with ____ and the suffix begins with a vowel.

CVC

Wild Card

100

Pre + cook + ed =

Precooked

200

Mud + y + ed =

Muddied

300

Slime + y + er =

Slimier

400

Double the last letter if the one syllable base ends with CVC and the suffix begins with a _______.

Vowel