African-American Vernacular English
Many features set AAVE apart from other forms of American English (particularly, General American). McWhorter argues that what truly unites all AAVE accents is a uniquely wide-ranging intonation pattern or "melody", which characterizes even the most "neutral" or light African-American accent. Many versions of African American Vernacular English are non-rhotic (engaging in r-dropping), turn the i diphthong into a monothong, etc.