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A250 exercises · 5 sections

Impersonal si

The Lesson

What is the Impersonal si?

The impersonal 'si' is used in Italian to make general statements — equivalent to English 'one', 'you', 'people', 'we', or passive constructions like 'it is said'. It removes any specific subject from the sentence, expressing something that people in general do, say, or experience. The construction uses 'si' placed before a verb conjugated in the third person.

Basic Structure: si + verb

Verb typeItalianEnglish
Intransitive (no object)Si viaggia molto.People travel a lot.
Intransitive (no object)Si dorme bene qui.One sleeps well here.
Transitive + singular objectSi vende una casa.A house is being sold.
Transitive + plural objectSi vendono delle case.Houses are being sold.
General customSi mangia bene in Italia.People eat well in Italy.
NegativeNon si fa così!That's not how it's done!

Agreement with Transitive Verbs

When the impersonal 'si' is used with a transitive verb (a verb that takes a direct object), the verb agrees in number with the object — not with 'si' itself. If the object is singular, use the 3rd person singular. If the object is plural, use the 3rd person plural. Examples: 'Si vende un appartamento.' (singular object → singular verb) vs 'Si vendono due appartamenti.' (plural object → plural verb). With intransitive verbs or when there is no article-defined object, always use the singular: 'Si parla italiano.' but 'Si parlano molte lingue.'

Verb Agreement with Impersonal si

Italian sentenceVerb formReason
Si vende una casa.vende (singular)Object 'una casa' is singular
Si vendono due case.vendono (plural)Object 'due case' is plural
Si parla italiano.parla (singular)Language = uncountable / intransitive feel
Si parlano molte lingue.parlano (plural)Object 'molte lingue' is plural
Si mangia la pizza.mangia (singular)Object 'la pizza' is singular
Si mangiano le pizze.mangiano (plural)Object 'le pizze' is plural

Adjective Agreement with Impersonal si

When an adjective or past participle follows the impersonal 'si' (especially with the verb 'essere'), it must be in the MASCULINE PLURAL form — regardless of the gender of the actual people involved. This is a fixed grammatical convention. Examples: 'Quando si è stanchi, si dorme.' (When one is tired, one sleeps.) — stanchi is masculine plural. 'Se si è contenti, si lavora meglio.' (If one is happy, one works better.) — contenti is masculine plural. 'Da giovani, si è spensierati.' (When young, one is carefree.) — spensierati is masculine plural.

Common Impersonal si Expressions

  • Si dice che...They say that... / It is said that...
  • Si sa che...Everyone knows that... / It is known that...
  • Come si scrive?How do you spell it? / How is it written?
  • Come si dice 'hello' in italiano?How do you say 'hello' in Italian?
  • Non si sa mai.You never know. / One never knows.
  • Come si fa?How do you do it? / How is it done?
  • Non si fa così!That's not how it's done!
  • Si può sapere perché?May one ask why? / Can you tell me why?
  • Si tratta di...It is a matter of... / It concerns...
  • Si spera che...One hopes that... / It is hoped that...

Impersonal si vs Reflexive si

Both impersonal 'si' and reflexive 'si' look identical, but they have different meanings. Reflexive 'si' means the subject acts on itself (e.g., 'Mario si lava' = Mario washes himself). Impersonal 'si' expresses a general action with no specific subject (e.g., 'In Italia, si mangia bene' = In Italy, people eat well). When a reflexive verb must be used impersonally, Italian uses 'ci si' to avoid the impossible 'si si': 'Ci si lava le mani prima di mangiare.' (One washes one's hands before eating.) 'Ci si alza presto in campagna.' (One gets up early in the countryside.)

Key Rules Summary

1. Intransitive verbs: always si + 3rd person SINGULAR. 2. Transitive verbs: verb agrees with the object (singular object = singular verb; plural object = plural verb). 3. Adjectives after impersonal si are always MASCULINE PLURAL — even if all real speakers are female. 4. For reflexive verbs used impersonally, use 'ci si' (not 'si si'). 5. The impersonal si is very common in signs, instructions, recipes, and general statements about customs and habits.

Practice Exercises

50 exercises · 10 questions each