Això és un llibre.

• Això = this or this thing
• és = is
• un = a
• llibre = book

So the structure is very close to English: this + is + a + book.

A simple learner-friendly pronunciation is:

• Això ≈ eye-SHOH or uh-SHOH depending on accent
• és ≈ ess
• un ≈ oon or a shorter un
• llibre ≈ LYEE-bruh or sometimes closer to YEE-bruh, depending on dialect

A rough full version is:

eye-SHOH ess oon LYEE-bruh

Catalan pronunciation varies by region, so you may hear small differences.

This is one of the sounds English speakers often notice.

In many varieties of Catalan, ll is pronounced like the lli in some careful pronunciations of million, or like ly in yes with an l before it.

So llibre is often approximated as:

LYEE-bruh

In some accents, ll may sound closer to a simple y sound. Both are normal depending on the dialect.

The accent marks help show pronunciation.

• això has ò, which tells you the stressed vowel is an open o
• és has é, which marks the stressed vowel and also helps distinguish it from other forms such as es

So the accents are not optional spelling decorations; they are part of the correct written form.

Catalan, like Spanish, has two main verbs that can both translate as to be:

• ser → used for identity, classification, origin, etc.
• estar → used more for location, condition, temporary states, etc.

Here, the sentence is identifying or classifying something: it says that this thing is a book. For that, Catalan uses ser:

• Això és un llibre

So és is the correct form.

Because llibre is a singular countable noun, and Catalan normally uses the indefinite article here, just as English does in a book.

• un llibre = a book

If you said just Això és llibre, that would sound ungrammatical in standard Catalan.

Això is a neuter demonstrative pronoun. It means this when you are referring to a thing without naming the noun directly.

You use això when:

• you do not say the noun itself
• the gender is not being specified
• you are pointing to an object or situation as this

By contrast:

• aquest = this for a masculine noun
• aquesta = this for a feminine noun

For example:

• Aquest llibre = this book
• Aquesta taula = this table
• Això = this / this thing

So Això és un llibre is natural because això stands alone.

Because llibre is a masculine noun in Catalan.

Catalan nouns have grammatical gender, so the article must agree with the noun:

• masculine singular: un llibre
• feminine singular: una revista

Even though book is not gendered in English, in Catalan every noun belongs to a grammatical gender class.

Sometimes yes, if the context is clear.

Catalan often allows the subject to be omitted, because the verb form gives some information. So És un llibre can mean It is a book or This is a book if everyone knows what you are talking about.

But Això és un llibre is clearer and more explicit, especially for beginners.

Yes, it is very similar here.

The order is:

• Això = subject
• és = verb
• un llibre = predicate noun

So the pattern is:

subject + verb + noun phrase

This makes the sentence easy for English speakers to understand.

You would use the definite article el instead of un:

• Això és el llibre = This is the book

So:

• un llibre = a book
• el llibre = the book

The difference is the same basic idea as in English: un is indefinite, el is definite.