Learn Hardcore Russian: Это интересное правило.

Это translates roughly as "this" (or "that" in some contexts) and functions as a demonstrative pronoun. In the sentence, it introduces or points out the subject, much like saying "this is" in English, even though there is no explicit verb present.

Why is there no verb equivalent to "is" in the sentence Это интересное правило?

In Russian, the present tense of the copula (the verb "to be") is typically omitted. The connection between the subject and its predicate is understood from the context, so there's no need for an explicit "is."

Why does the adjective интересное end with -ое?

Russian adjectives must agree with the nouns they modify in gender, number, and case. Since правило is a neuter noun, the adjective интересное takes the neuter singular ending -ое to match it correctly.

How do adjectives like интересное agree with nouns in Russian?

Adjectives in Russian change their endings to reflect the gender, number, and case of the noun they describe. In this sentence, интересное matches правило because both are neuter and in the nominative case, following the rules of adjective-noun agreement.

What are the key structural differences between this Russian sentence and a similar English sentence?

One key difference is the lack of an explicit verb "to be" in the Russian sentence; Russian omits it in the present tense. Additionally, Russian adjectives, such as интересное, change their endings based on the grammatical gender, number, and case of the noun they modify, a feature that English adjectives do not exhibit.