AREN'T


Meaning of AREN'T in English

■ contraction

1》 are not.

2》 am not (only used in questions).

Usage

Aren't is used to mean ‘am not’ in questions, as in I'm right, ~ I? Outside questions, ~ used to mean ‘am not’ (e.g. I ~ going ) is wrong.

Concise Oxford English vocab.      Сжатый оксфордский словарь английского языка.