Almost any word you can think of that has a double consonant preceeded by a vowel will have a short vowel sound, just as almost any word with a single consonant after the vowel will make the vowel a long sound.
A few words that have a short vowel sound followed by a double consonant are: batter, better, bitter, butter, hemming, teller, messier and letter.
"Clamp" does not contain a short vowel. It contains a short 'a' sound followed by the consonant blend 'mp'.
short
In the word "program," the letter "o" is a short vowel sound. A short vowel sound is typically the sound that the vowel makes in the word when it is followed by a consonant. In this case, the letter "o" is followed by the consonant "g," so it makes a short vowel sound.
In the word "focus," the letter "o" has a short vowel sound. A short vowel sound is typically heard when a vowel is followed by a consonant, as in the word "focus" where the "o" is followed by the consonant "c." This results in a quick and crisp pronunciation of the vowel sound.
A vowel consonant E syllable is a syllable that consists of a vowel followed by a consonant and then an "E." The presence of the silent "E" at the end of the syllable often affects the pronunciation of the vowel, making it long instead of short.
Monosyllabic words and their derivatives have a short vowel. A vowel followed by a single consonant and an 'e' is long. A vowel followed by a single consonant and a different vowel is likely to be long. A vowel followed by two consonants is short. There are exceptions, of course, and you just have to learn them I'm afraid.
"Clamp" does not contain a short vowel. It contains a short 'a' sound followed by the consonant blend 'mp'.
short
In the word "program," the letter "o" is a short vowel sound. A short vowel sound is typically the sound that the vowel makes in the word when it is followed by a consonant. In this case, the letter "o" is followed by the consonant "g," so it makes a short vowel sound.
In the word "focus," the letter "o" has a short vowel sound. A short vowel sound is typically heard when a vowel is followed by a consonant, as in the word "focus" where the "o" is followed by the consonant "c." This results in a quick and crisp pronunciation of the vowel sound.
The double "n" in "running" is a result of the rule for forming the present participle of one-syllable verbs that end in a single vowel followed by a consonant. In this case, "run" ends with a vowel (u) followed by a consonant (n). To maintain the short vowel sound when adding the suffix "-ing," the final consonant is doubled, resulting in "running." This doubling helps preserve the pronunciation and rhythm of the word.
The double "t" in "quitting" follows the spelling rule for adding a suffix to a word ending in a short vowel followed by a consonant. By doubling the consonant, we preserve the short vowel sound in the base word "quit."
In English, when a vowel is followed by a single consonant and then another vowel, that indicates that the first vowel is a long vowel, as in for example the word kite, long i. If the consonant were double, then the vowel is short, as in the word kitten, short i. So, when adding a suffix, it is sometimes necessary to also add another consonant in order to avoid changing the pronunciation of the vowel that precedes it. Of course, as with all rules of English grammar, there are exceptions.
Verbs spelled with a single vowel letter followed by a single consonant letter will double the consonant.
A vowel consonant E syllable is a syllable that consists of a vowel followed by a consonant and then an "E." The presence of the silent "E" at the end of the syllable often affects the pronunciation of the vowel, making it long instead of short.
It is considered a vcv because the double M has only the single M sound.
You double the consonant before adding "ing" to a word that has a short vowel sound and ends with a single consonant if the consonant is preceded by a single vowel. This helps to keep the pronunciation of the word consistent.