We use ...

A + word that begins with a affirmativeconsonantnegativepluralquestionsuncountablevowel.
AN + word that begins with a affirmativeconsonantnegativepluralquestionsuncountablevowel.
SOME in affirmativeconsonantnegativepluralquestionsuncountablevowel sentences.
- before a affirmativeconsonantnegativepluralquestionsuncountablevowel noun.
- before an affirmativeconsonantnegativepluralquestionsuncountablevowel noun.
ANY in affirmativeconsonantnegativepluralquestionsuncountablevowel sentences and affirmativeconsonantnegativepluralquestionsuncountablevowel and in the same situations as some.