Komedie je krátká.

Because krátká is an adjective and it has to agree with komedie.

In this sentence:

• komedie = a feminine singular noun
• krátká = a feminine singular adjective in the nominative

Czech adjectives change their endings to match the noun’s:

• masculine: krátký
• feminine: krátká
• neuter: krátké

So Komedie je krátká uses the feminine form because komedie is feminine.

Komedie is a feminine noun in Czech. Learners often want a clear rule, but noun gender is something you partly learn with each word.

That said, nouns ending in -e can belong to different genders, so you cannot rely on the ending alone every time. For komedie, you simply learn it as feminine, and the adjective agreement confirms it:

• ta komedie = the comedy
• krátká komedie = a short comedy

Using ta and krátká shows that the noun is feminine.

Je means is.

It is the 3rd person singular form of být = to be.

So:

• komedie = comedy
• je = is
• krátká = short

Together: The comedy is short or A comedy is short, depending on context.

In normal Czech, you usually keep je in this kind of sentence.

So the standard sentence is:

• Komedie je krátká.

Leaving out je would usually sound incomplete or unnatural in ordinary speech.

This is different from some other Slavic languages where the present-tense to be may be omitted more often.

Because Czech does not have articles like English a/an and the.

So komedie can mean:

• a comedy
• the comedy

The exact meaning depends on context.

For example:

• Komedie je krátká. = The comedy is short / A comedy is short

If you want to make it more clearly definite, Czech often uses other words, such as:

• Ta komedie je krátká. = That/The comedy is short.

It is an adjective.

Here it describes the noun komedie, even though it comes after je.

This is called a predicate adjective in English grammar:

• krátká komedie = a short comedy
• Komedie je krátká. = The comedy is short.

In both cases, krátká is an adjective.

A simple learner-friendly pronunciation guide is:

• Komedie ≈ KO-me-di-ye
• je ≈ ye
• krátká ≈ KRAAT-kaa

A few useful notes:

• Czech stress is usually on the first syllable of a word.
• á is a long vowel, so it is held a little longer than a.
• je is pronounced like ye, not like English jee.

So the whole sentence sounds roughly like:

KO-me-di-ye ye KRAAT-kaa

Yes, Czech word order is more flexible than English word order.

The neutral, basic version is:

• Komedie je krátká.

But other word orders are possible for emphasis or style, for example:

• Krátká je komedie.

That version is not the most neutral one. It can sound more literary or emphasize short.

For a beginner, the safest pattern is:

• Subject + je + adjective

So: Komedie je krátká.

Because it is linked to the subject through je.

In Komedie je krátká:

• komedie is the subject, in the nominative
• krátká is the predicate adjective, and in Czech it also appears in the nominative

So both parts match in gender, number, and case:

• komedie = feminine singular nominative
• krátká = feminine singular nominative

Yes, in this sentence they would be wrong.

Because komedie is feminine singular, the adjective must also be feminine singular:

• correct: krátká
• not correct here: krátký
• not correct here: krátké

Those other forms are used with different nouns:

• film je krátký = the film is short
  masculine
• představení je krátké = the performance is short
  neuter

Yes.

Depending on context, komedie can refer to:

• the general category comedy
• a specific comedy, such as a play or a film

So Komedie je krátká could mean:

• The comedy is short if you are talking about one specific work
• something more general only if the context clearly supports that

In everyday use, listeners usually understand it from the situation.