There is a tendency to make "haber" agree with what follows, as though it were the subject, particularly in tenses other than the present indicative. There is heavier stigma on inventing plural forms for "hay", but "hain", "han", and suchlike are sometimes encountered in non-standard speech. The form "habemos" is common (meaning "there are, including me"); it very rarely replaces "hemos" to form the present perfect tense in modern language, and in certain contexts it is even acceptable in formal or literary language: