ain't是什么意思？

ain't
[eint]
prep.
不是

ain't
ain't
AHD:[³nt]
D.J.[eint]
K.K.[ent]
NONENon-Standard （无词性）【非标准用语】
Am not.
不是
Used also as a contraction for are not, is not, has not, and have not.
也可用作are not，is not，has not 和 have not 的缩略语

The use of ain't as a contraction of am not, are not, is not, has not, and have not has a long history, but ain't has come to be regarded as a mark of illiteracy and has by now acquired such a stigma that it is beyond any possibility of rehabilitation. However, it is used by educated speakers, for example, when they want to strike a jocular or demotic note, as in fixed expressions like Say it ain't so or You ain't just whistling Dixie. · The stigmatization of ain't leaves us with no happy alternative for use in first-person questions. The widely used aren't I?, though illogical, was found acceptable for use in speech by a ma