Questo è un libro russo.

In Italian, questo can work on its own as a pronoun, meaning this.

So in Questo è un libro russo, questo means this or this thing.

Compare:

• Questo è un libro russo. = This is a Russian book.
• Questo libro è russo. = This book is Russian.

In the first sentence, questo stands alone. In the second, it directly modifies libro.

È with an accent is the verb is from essere (to be).

• è = is
• e = and

The accent is very important because it changes the meaning.

So:

• Questo è un libro russo. = This is a Russian book.
• Questo e un libro russo would be incorrect.

Un is the indefinite article, meaning a or an.

• un libro = a book

Italian usually uses an article where English does in this kind of sentence. Since libro is a singular masculine noun starting with a consonant, the correct form is un.

Some related forms are:

• un for many masculine singular nouns: un libro
• uno for certain masculine singular nouns: uno studente, uno zaino
• una for feminine singular nouns: una casa

Because libro is a masculine singular noun, the adjective must agree with it.

• libro = masculine singular
• russo = masculine singular form of Russian

Italian adjectives usually agree in gender and number with the noun they describe.

So:

• un libro russo = a Russian book
• una rivista russa = a Russian magazine
• libri russi = Russian books
• riviste russe = Russian magazines

It can mean different but related things depending on context.

In this sentence, russo describes libro, so it means something like Russian in origin, language, or association.

For example:

• un libro russo could mean a book from Russia
• It could also mean a book written in Russian, depending on context

As a noun, un russo can mean a Russian man, and una russa means a Russian woman.

In Italian, many adjectives normally come after the noun, especially adjectives of nationality, origin, color, and classification.

So:

• un libro russo
• una macchina italiana
• un vino francese

This is different from English, where adjectives usually come before the noun.

While some Italian adjectives can come before the noun, russo in this meaning normally comes after it.

Yes, absolutely. But it means something slightly different in structure.

• Questo è un libro russo. = This is a Russian book.
• Questo libro è russo. = This book is Russian.

The first identifies what this is.
The second talks directly about this book.

In many situations, both could fit, but they are not structured the same way.

Italian often does not use a subject pronoun when it is not needed. The verb form usually makes the subject clear, or the context does.

In this sentence, questo already functions as the subject:

• Questo è ... = This is ...

So there is no need to add an extra word meaning it.

Italian does have pronouns like esso or ciò, but they are not normally used here.

A simple approximate pronunciation is:

KWEH-stoh eh oon LEE-broh ROOS-soh

A few details:

• qu sounds like kw
• e in questo is a clear eh
• è is also eh
• un is pronounced more like oon
• ss in russo is pronounced as a strong double consonant

If you want to sound more natural, try to keep the vowels clear and short rather than reducing them like in English.

Not directly in this sentence.

Here, questo is standing alone as a pronoun, but it is still in the masculine singular form. That often matches the thing being referred to, especially if the speaker has a masculine noun in mind, like libro.

The main forms are:

• questo = masculine singular
• questa = feminine singular
• questi = masculine plural
• queste = feminine plural

So if you were referring to a feminine noun, you would use questa:

• Questa è una rivista russa.

No. In standard Italian, you need the article here:

• Questo è un libro russo.

Leaving out un would sound ungrammatical in this sentence.

Italian uses articles more regularly than English learners sometimes expect, so it is important to include them with singular countable nouns like libro.

You need to change the demonstrative, the verb, the noun, and the adjective so they all match in number:

• Questi sono libri russi.

Breakdown:

• questi = these
• sono = are
• libri = books
• russi = Russian (masculine plural)

If the noun were feminine, the forms would change accordingly:

• Queste sono riviste russe. = These are Russian magazines.