Autor tvrdí, že dílo je důležité.

Že means that and introduces a subordinate clause:

• Autor tvrdí = The author claims
• že dílo je důležité = that the work is important

So the sentence structure is:

• main clause: Autor tvrdí
• subordinate clause: že dílo je důležité

In Czech, že is very commonly used after verbs like:

• říkat = to say
• myslet si = to think
• vědět = to know
• tvrdit = to claim/assert

Unlike English, Czech usually keeps že in this kind of sentence, where English might sometimes omit that.

Tvrdí is the 3rd person singular present tense form of tvrdit.

That matches the subject autor = author, which is singular:

• já tvrdím = I claim
• ty tvrdíš = you claim
• on/ona tvrdí = he/she claims
• autor tvrdí = the author claims

So tvrdí means claims / asserts.

A learner may also notice that the infinitive is tvrdit, but the present-tense stem changes slightly in the normal conjugation pattern.

Because Czech adjectives must agree with the noun they describe.

Here:

• dílo is neuter singular
• so the adjective must also be neuter singular
• therefore: důležité

Compare:

• důležitý autor = important author (masculine)
• důležitá kniha = important book (feminine)
• důležité dílo = important work (neuter)

So the ending -é in důležité tells you it agrees with a neuter singular noun.

Here dílo is in the nominative singular, because it is the subject of the clause:

• dílo je důležité = the work is important

In other words, what is important? → dílo

A useful thing to know is that for many neuter nouns, the nominative and accusative singular forms are the same. So dílo can look the same in both cases, but in this sentence it is nominative because it is the subject.

In standard Czech, you normally must include je in the present tense in this kind of sentence.

So:

• Dílo je důležité. = correct
• Dílo důležité. = not normal standard Czech

This is different from some languages where the present tense of to be can be omitted. Czech generally keeps it.

The basic neutral order here is:

• Autor tvrdí, že dílo je důležité.

But Czech word order is more flexible than English because case endings help show grammatical roles.

Possible variations can occur for emphasis or style, for example:

• Autor tvrdí, že důležité je dílo.
• Že dílo je důležité, autor tvrdí.

However, these are not equally neutral. The original sentence is the most straightforward and natural if you are simply stating the fact.

So yes, word order can change, but the original version is the best default pattern for learners.

Not exactly. Tvrdit usually means something stronger than simply říkat (to say).

It often means:

• to claim
• to assert
• to maintain

So Autor tvrdí, že... can suggest that the author is presenting something as true, perhaps firmly or argumentatively.

Compare:

• Autor říká, že... = The author says that...
• Autor tvrdí, že... = The author claims/asserts that...

In some contexts, tvrdí can even sound slightly skeptical in English translation, depending on tone and context.

Czech has no articles, so there is no direct equivalent of the or a/an.

That means:

• autor can mean author / the author / an author
• dílo can mean work / the work / a work

The exact meaning depends on context.

So in this sentence, English needs articles, but Czech does not.

Autor is in the nominative singular, because it is the subject of the main clause:

• Autor tvrdí = The author claims

Also, autor is a masculine animate noun. That matters in Czech because masculine animate nouns often behave differently from masculine inanimate nouns in declension, especially in the accusative and plural.

But in this sentence, you just need to recognize it as nominative singular subject.

A few pronunciation points are especially useful here:

• dílo ≈ DEE-lo
• důležité ≈ DOO-le-zhi-teh

Important details:

• í is a long ee sound
• ů is a long oo sound
• ž sounds like the s in measure
• é is a long eh sound

Also remember that Czech stress is usually on the first syllable of the word:

• DÍ-lo
• DŮ-le-ži-té
• AU-tor
• TVR-dí

Usually, no.

In English, both of these are natural:

• The author claims that the work is important.
• The author claims the work is important.

In Czech, after tvrdí, the version with že is the normal one:

• Autor tvrdí, že dílo je důležité.

Leaving out že would sound unnatural in standard Czech.

So this is a good habit to build early: after verbs like say, think, claim, know, Czech often uses an explicit že-clause.

Yes. Dílo often refers to a work in the sense of something created, especially:

• a literary work
• a work of art
• a musical work
• a body of work

So in many contexts it sounds more like:

• piece of work
• artistic/literary work
• creation

rather than everyday work as in employment or task.

That is why dílo fits naturally with autor. It suggests something the author created or produced.