Learn Hardcore Ukrainian: Він є чудовим прикладом для нас у всіх справах. - He is an excellent example for all of us in everything.

є is the copula linking the subject Він (he) to the predicate чудовим прикладом (a wonderful example). Although Ukrainian often omits the copula in the present tense, its explicit use here serves to emphasize the state of being.

Why are чудовим прикладом in the instrumental case?

In Ukrainian, when a subject is equated to a noun or described by an adjective-noun combination through a copula, the predicate is typically in the instrumental case. This case expresses the role or state the subject is in—here, it indicates that he embodies the role of a wonderful example.

What does the prepositional phrase для нас mean, and what is its grammatical significance?

Для нас translates to "for us." The preposition для governs the genitive case, and although нас looks the same as the accusative form, it functions here as a genitive pronoun indicating who benefits or who is being addressed by the statement.

How does the phrase у всіх справах contribute to the sentence’s meaning?

У всіх справах means "in all affairs" or "in every matter." It specifies that the exemplary quality is universal across all actions or situations, emphasizing that he serves as a role model in every respect.

Is the inclusion of є mandatory in Ukrainian present-tense sentences, and what effect does its presence have?

No, in Ukrainian the copula є is often omitted in the present tense as the meaning is generally clear from context. However, including є can add clarity or emphasis, as seen here where it clearly connects the subject with its descriptive complement.