Кричать на ребёнка невежливо.

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Breakdown of Кричать на ребёнка невежливо.

• ребёнок: the child
• кричать: to shout
• невежливо: impolite

Questions & Answers about Кричать на ребёнка невежливо.

Why is кричать in the infinitive with no subject? Where is the “it” from “It’s impolite to shout at a child”?

Russian often uses an impersonal construction with the infinitive to express general statements like English “It is … to do X.”

Structure here:

• Кричать на ребёнка – “to shout at a child” (infinitive phrase)
• невежливо – “is impolite” (predicative adverb)

There is no explicit subject (no “it”). The whole infinitive phrase functions like the subject in English:

• Кричать на ребёнка невежливо.
  ≈ To shout at a child is impolite. / It is impolite to shout at a child.

This pattern is very common:

• Опаздывать нехорошо. – Being late is not good.
• Курить вредно. – It’s harmful to smoke.

What grammatical form is ребёнка, and why not ребёнок?