ain't /
nt/
1 are not, am not, is not の縮約形. ★今は無学の人または 《方言》 の用法; ただし《米口語》 では特に ain't I の形は教養ある人も用いる (cf.
an't 4,
amn't,
not 1 a).
・You
ain't going.
・I'm going too,
ain't I?
2 have not, has not の縮約形《非標準的な語》.
・I
ain't seen him.
・He
ain't got it.
《1778》 《短縮》 ←
are not, etc.
