When to double the final consonant?

 If a word of more than one syllable ends with a short vowel and one consonant,

• DOUBLE THE FINAL CONSONANT before adding a suffix that begins with a

vowel if the accent is on the last syllable.

• DO NOT DOUBLE THE FINAL CONSONANT if the accent is not on the last syllable or if the suffix begins with a consonant.

Double the Final Consonant

-ing, -ed -ence, -ent -ance -al

befitting abhorrence acquittance acquittal

befogged concurrent admittance transmittal

committing excellence remittance noncommittal

compelled intermittent transmittance

controlling occurrence

impelling recurrent

incurred

omitting -er -en -able

permitted beginner forbidden controllable

propelling propeller forgotten forgettable

regretted transmitter regrettable

submitting

Do NOT Double the Final Consonant

ENDING IN TWO VOWELS ACCENT NOT SUFFIX BEGINS

TWO CONSO- BEFORE THE ON THE FINAL WITH A

NANTS CONSONANT SYLLABLE CONSONANT

-ing, -ed -ing, -ed -ing, -ed -ment

consenting concealing benefiting allotment

converted contained blossomed annulment

demanding detaining differed commitment

diverted disdained gathered deferment

requesting refraining limiting equipment

subsisted remounted profited interment

supplanting restraining quarreling preferment

supported retained soliciting

transcending revealing summoned