All words of one syllable ending in l, with a single vowel before it, have double l at the close; as, mill, sell.
In simple derivatives a single final consonant following a single vowel in a syllable that receives an accent is doubled when another syllable beginning with a vowel is added.
All words of one syllable ending in l, with a single vowel before it, have ll at the close; as mill, sell.
Sometimes the pitch may rise or fall, or rise and fall, or fall and rise during the utterance of a single vowel.
In bead we have not a single vowel, but a kind of diphthong.
The above list will hopefully provide you with a few useful examples demonstrating the appropriate usage of "single vowel" in a variety of sentences. We hope that you will now be able to make sentences using this group of words.