Rozcestí je vedle lesa.

Je is the 3rd person singular present tense of být (to be), so it means is.

In this sentence, rozcestí is the subject, and it is treated as singular, so Czech uses je:

• Rozcestí je... = The crossroads/junction is...

Czech usually does not need to say a subject pronoun like it, so you do not say Ono je vedle lesa in a normal sentence like this.

Because the preposition vedle (next to / beside) normally takes the genitive case when it expresses location.

The basic dictionary form is:

• les = forest

But after vedle, it changes to the genitive singular:

• vedle lesa = next to the forest

So:

• les = nominative
• lesa = genitive singular

This is one of the most important things to notice in the sentence.

In standard Czech, vedle is used with the genitive.

So you get patterns like:

• vedle domu = next to the house
• vedle školy = next to the school
• vedle lesa = next to the forest

For a learner, the safest rule is:

• learn vedle + genitive

Here, rozcestí is singular.

You can tell from the verb:

• je = is → singular

That is important because English crossroads can look plural even when it means one place. Czech does not work that way here: rozcestí is a normal singular noun in this sentence.

Rozcestí is a neuter noun.

That matters because Czech nouns belong to grammatical genders, and gender affects agreement and declension.

In this sentence, you do not see much agreement directly, but it is useful to know the dictionary information:

• rozcestí = neuter noun

Many Czech neuter nouns end in -í, and rozcestí is one of them.

Czech has no articles.

So where English says:

• the crossroads is next to the forest
• a crossroads is next to a forest

Czech can simply say:

• Rozcestí je vedle lesa.

Whether it means the or a depends on the context. Czech speakers usually understand this from the situation, previous conversation, or general context.

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

The sentence:

• Rozcestí je vedle lesa.

is a neutral way to say it.

You could also say:

• Vedle lesa je rozcestí.

This version puts more focus on the location first, a bit like:

• Next to the forest, there is a crossroads.

Both are grammatical, but the emphasis changes slightly.

Because it is the subject of the sentence, so it is in the nominative case.

Its form here is the basic dictionary form:

• rozcestí

Also, nouns of this type often have the same form in several cases, so learners may feel that the word is not changing, even though it still belongs to a declension pattern.

In this sentence, though, the main point is simple:

• rozcestí = nominative subject
• lesa = genitive after vedle

A helpful approximate pronunciation is:

• ROZ-tses-tee ye VED-le LE-sa

A few useful points:

• Czech stress is usually on the first syllable of each word.
• The final -í in rozcestí is a long vowel.
• j in je sounds like English y in yes.

So je sounds roughly like:

• ye

And vedle sounds roughly like:

• VED-le

A very useful takeaway is:

• [place/thing] + je + vedle + genitive

For example:

• Dům je vedle školy. = The house is next to the school.
• Auto je vedle domu. = The car is next to the house.
• Rozcestí je vedle lesa. = The crossroads is next to the forest.

So this sentence is a good model for learning both:

• je = is
• vedle + genitive = next to