Impersonal verbs or verb forms do not refer to any one particular person. They can generally be translated by the English ‘it’ form and use the third person form: occorre pulire prima la casa ‘It is necessary to clean the house first’; non serve protestare ‘it’s no good protesting’. These verbs can be personalised by the addition of a personal pronoun, usually the indirect object: non mi occorre questo maglione ‘I don’t need this thick sweater’.