河南沈丘方言有带舌尖后介音的[■■]类音节。这个介音是古代[*-i-]介音的遗存。从[■■]类音节可以发展成北京型的[■■]类音节,也可以发展成一部分中原官话和晋语方言的[■■:?]类音节。 Henan Shenqiu dialect with [] ■ after the tip of the tongue mediated [syllable-like syllables. This medium is the remains of the ancient [* -i-] interlocution. From [■ ■] syllables can be developed into Beijing-type [■ ■] syllables, but also can be part of the Central Plains Mandarin and Jin dialect [■ ■:?] Syllables.