sentences:  In North America, a number of chain shifts such as the Northern Cities Vowel Shift and Canadian Shift have produced very different vowel landscapes in some regional accents.Some dialects have fewer or more consonant phonemes and phones than the standard varieties.Some conservative varieties like Scottish English have a voiceless sound in "whine" that contrasts with the voiced in "wine", but most other dialects pronounce both words with voiced , a dialect feature called "wine"–"whine" merger.