Rules of Doubling the Final Consonant in a Verb

Rule 1: In a one-syllable verb ending in one consonant letter preceded by one vowel letter, double the final consonant letter (never double "w, x, y").

Rule 2: If the verb ends with "e", drop "e", then add "ing" or "ed". Do not double the consonant letter.

Rule 3: If a verb has two vowel letters before the final consonant letter, do not double the consonant letter.

Rule 4: When a verb ends with "y", and before "y", it's a consonant, change "y" to "i", and then add "ed". (Never double "y, x, w")

Rule 5: When a verb ends with "y" and before "y" there is only one vowel letter, do not change "y" to "i"; simply add "ing" or "ed".

Rule 6: For a two-syllable or three-syllable verb, if the last syllable is stressed, follow the one-syllable word spelling rule to double the final consonant letter.

Rule 7: If the last syllable is not stressed, do not double the final consonant letter.

Exceptions: