Name _______________________________________

Lesson 17   1 + 1 + 1 words and VAC words

fitfitted fitting fitness
thin thinner thinnest thinness
mad madder maddest madly
throb throbbed throbbing
sum summed summary
zip zipped zipper
quit quitting quitter
admit admitted admittance
remit remitted remittance
permit permitted permitting
omit omitted omitting
submit submitted submitting
occur occurred occurrence
recur recurred recurrence
concur concurred concurrent
regret regretted regrettable
acquit acquitted acquittal
equip equipped equipping equipment
annul annulled annulling annulment
commit committed committing commitment


A word that has 1 syllable, 1 vowel, and 1 final consonant is called a 1 + 1 + 1 word: fit.

A word that has a single vowel in a final accented syllable with one final consonant is called a VAC word: ad-mit'.

The first several words in the first column are 1 + 1 + 1 words. The last thirteen are VAC words.

1. What happens to the final consonant of these words when a suffix beginning with a vowel is added?


2. What happens when a suffix beginning with a consonant is added?


3. In what three words are the letters qu treated as a single consonant?

__________   __________   __________

Lesson Generalization

Double the final consonant of a 1 + 1 + 1 word or a VAC word before a suffix that begins with a vowel. Do not double the final consonant before adding a suffix that begins with a consonant.

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