Under what circumstance is the CVC (1-1-1) Doubling Rule applicable?

The CVC (consonant-vowel-consonant) Doubling Rule is applicable in one-syllable words that follow a specific vowel-consonant pattern where there is a single vowel followed by a single consonant. This rule states that when a one-syllable word ends with a single vowel followed by a single consonant, and that vowel is a short vowel sound, the final consonant should be doubled before adding a suffix that begins with a vowel, such as -ing or -ed.

For instance, in the word "run," the final consonant "n" is doubled when changing it to "running." This application emphasizes the need to maintain the short vowel sound by ensuring that the syllable maintains its structure after the suffix is added.

The other circumstances presented do not align with the specific conditions of the CVC Doubling Rule. Multi-syllable words without accents, two-syllable words ending in vowels, or words with silent letters typically do not follow this rule as they don't adhere to the required one-syllable structure and vowel-consonant pattern necessary for applying the CVC Doubling Rule effectively.