Following are tables with conjugations for the most common irregular verbs in the imperative mood.
- Avere and essere have unique forms for the second person singular and they use the subjunctive in all other persons.
avere
essere
tu
abbi sii Lei
abbia sia noi
abbiamo siamo voi
abbiate siate Loro
abbiano siano Signor Rossi, abbia pazienza!
Mr. Rossi, have patience!
Pia, sii ragionevole!
Pia, be reasonable! - A few verbs, in the second person singular, can use either a contracted form or the full form of the indicative (excluding dire).