Impersonal French

Impersonal Expressions
Impersonal expressions are those which do not have a specific subject, as in Il est difficile à dire.

Impersonal Pronouns
Unlike personal pronouns, impersonal pronouns do not change according to grammatical person. However, some of them change to agree in gender and number with the noun that they replace.

Impersonal Verbs
Impersonal verbs have only one conjugation: the third person singular indefinite, or il, which in this case is equivalent to "it" in English.

Impersonal Verb Moods
Impersonal moods do not distinguish between grammatical persons. They are not conjugated, but instead have a single form for all persons.

Passive Reflexive
In the passive reflexive construction, a normally non-reflexive verb is used reflexively in order to express the passive nature of the action and make it impersonal, as in Ça se voit - That's obvious.