Strategie a náhoda jsou důležité.

Here, strategie is most naturally singular: strategy.

This is a very common point of confusion because strategie has the same form in:

• nominative singular
• nominative plural

So by itself, strategie can mean either strategy or strategies depending on context.

In this sentence, the intended reading is singular because it is paired with another singular noun, náhoda (chance/coincidence), and together they form a compound subject:

• strategie a náhoda = strategy and chance

Even though each noun is singular, the combination is plural in meaning, so the verb is plural.

Because the subject is made of two things joined by a (and):

• strategie
• náhoda

In Czech, just like in English, A and B usually takes a plural verb.

So:

• Strategie je důležitá. = Strategy is important.
• Náhoda je důležitá. = Chance is important.
• Strategie a náhoda jsou důležité. = Strategy and chance are important.

That is why you get jsou (are) instead of je (is).

Because důležité is an adjective agreeing with the subject, and the subject is plural.

The basic adjective is:

• důležitý = important

Its form changes depending on gender and number. Here, the subject is a plural combination of two feminine nouns:

• strategie = feminine
• náhoda = feminine

So the adjective takes the feminine plural form:

• důležité

Compare:

• strategie je důležitá = strategy is important
• náhoda je důležitá = chance is important
• strategie a náhoda jsou důležité = strategy and chance are important

They are in the nominative case, because they are the subject of the sentence.

You can identify the subject by asking: What is important? Answer: strategie a náhoda

So both nouns are nominative:

• strategie
• náhoda

It is an adjective.

In this sentence, it is used predicatively, which means it comes after a form of být (to be) rather than directly before a noun.

So:

• důležitá strategie = an important strategy
  
  • adjective directly describing a noun
• strategie je důležitá = the strategy is important
  
  • adjective used with to be

In your sentence:

• Strategie a náhoda jsou důležité.

So důležité is still an adjective; it just appears in the predicate after jsou.

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

So Czech often leaves that information unstated, and you understand it from context.

For example:

• strategie can mean a strategy, the strategy, or just strategy in a general sense
• náhoda can mean a chance/coincidence, the chance/coincidence, or chance in general

In this sentence, English usually translates it generically:

• Strategy and chance are important.

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

The neutral order here is:

• Strategie a náhoda jsou důležité.

But you could also say:

• Důležité jsou strategie a náhoda.

That version puts more emphasis on důležité (important), something like:

• What is important is strategy and chance.

The grammar stays the same, but the focus changes.

A rough pronunciation guide is:

• Strategie ≈ STRA-teh-ghee-yeh
• a = ah
• náhoda ≈ NAA-ho-da
• jsou ≈ ysoh or often closer to soh in fast speech
• důležité ≈ DOO-leh-zhi-teh

A few important notes:

• Czech stress is usually on the first syllable of each word.
• The marks over vowels often show length, not stress.
• ž sounds like the s in measure.

So the sentence is stressed roughly like:

• STRAtegie a NAAhoda jsou DOOležité

They mostly mark vowel length.

In this sentence:

• á in náhoda = a long a
• ů in důležité = a long u
• é in důležité = a long e

So these are not optional spelling marks; they are part of the word and affect pronunciation.

Also:

• ž is a consonant, pronounced like the s in measure

In standard Czech, no.

Because the subject has two parts joined by a, it is plural, so the verb must be plural:

• jsou

Correct:

• Strategie a náhoda jsou důležité.

Not standard:

• Strategie a náhoda je důležité.

The dictionary forms are:

• strategie — strategy
• náhoda — chance, coincidence
• být — to be
  
  • jsou = they are / are
• důležitý — important
  
  • důležité is the agreeing form used here

This is useful because Czech dictionaries usually list:

• nouns in nominative singular
• verbs in the infinitive
• adjectives in the masculine singular base form

So even though the sentence has jsou and důležité, you would look up:

• být
• důležitý