This is a very common English pattern: bake>baking, for example.
No, a combining vowel is used when the suffix begins with a vowel.
Suffix
Suffix
add the suffix
When a suffix that begins with a vowel is added, the combining form usually precedes the suffix in order to maintain pronunciation ease. This helps to avoid the awkwardness that may arise when two vowels are adjacent to each other.
The e is generally dropped from the end of the root word. For example, change + -ed is changed; change + ing is changing.
ummm....... marry-marries
When adding a suffix to a word that ends with a single vowel followed by a single consonant, the consonant is doubled if the suffix begins with a vowel. This helps maintain the original pronunciation of the word.
To double the final consonant on a suffix when adding a word ending, the word must have one syllable, have a single vowel before the consonant, and end with a single consonant preceded by a single vowel. The suffix being added should begin with a vowel.
A combining vowel is never used when the suffix begins with a vowel. For example, in medical terminology, when attaching a suffix like "-itis" (inflammation) to a root word that ends in a vowel, the combining vowel is omitted. Additionally, it is not used when connecting two root words that already end and begin with vowels, allowing for a smooth transition without the need for an added vowel.
The word "opening" is spelled with a single 'n' because it follows the rule of dropping one of the consonants before adding a suffix that begins with a consonant. In this case, the suffix "-ing" begins with a vowel, so the 'n' in "open" is not dropped.
The use of double "t" in the word "bitten" follows the rule in English where a short vowel sound before a consonant is usually doubled when adding a suffix that begins with a vowel. In this case, the short vowel sound in "bite" is doubled before adding the "-en" suffix to maintain pronunciation clarity.