Od knihovny jdeš dál rovně až na náměstí.

Od means from / away from, and it requires the genitive case.

The noun knihovna means library. Its genitive singular form is knihovny.

So:

• knihovna = library
• od knihovny = from the library

This is a very common pattern in Czech:

• od školy = from the school
• od domu = from the house
• od zastávky = from the stop

So in this sentence, od knihovny gives the starting point.

Jdeš is the 2nd person singular form of jít (to go / to walk).

So literally it means you go.

In directions, Czech often uses this kind of direct you go... wording, just like English can say:

• You go straight
• Then you turn left

So jdeš fits natural spoken instructions to one person.

Related forms:

• jdeš = you go (to one person, informal)
• jdete = you go (to more than one person, or to one person politely)
• jdi / jděte = go! (imperative)

So this sentence sounds like someone informally explaining the route to one person.

Czech usually does not need subject pronouns when the verb already shows who the subject is.

Because jdeš already clearly means you go (singular, informal), adding ty is normally unnecessary.

So:

• Jdeš dál rovně. = You go straight on.

If you added ty, it would sound more emphatic, something like:

• Ty jdeš dál rovně... = You go straight on...
  maybe contrasting with someone else

This is very normal in Czech: the verb ending often tells you the subject.

Here dál means further / on / onward.

In directions, it often suggests continuing from the current point.

So:

• jdeš dál = you continue on / you go further
• jdeš dál rovně = you continue straight on

It adds the idea of keeping going, not just the direction itself.

Without dál, the sentence would still make sense:

• Od knihovny jdeš rovně až na náměstí.

That would still mean From the library, you go straight to the square.

Adding dál makes it feel a bit more like keep going straight on.

Rovně means straight or straight ahead.

It is the standard word used in route directions:

• Jdi rovně. = Go straight.
• Pořád rovně. = Straight on.
• Jeď rovně. = Drive straight.

In this sentence, rovně tells you the direction of movement.

So:

• jdeš dál rovně = you continue straight on

This is one of the most useful direction words in Czech.

Because they add slightly different ideas:

• dál = further / continue on
• rovně = straight

Together they mean something like:

• continue straight on
• keep going straight

So the sentence is not just saying the direction; it is also saying to keep going in that direction.

This combination is very natural in spoken directions.

Here až means something like:

• all the way to
• up to
• until

It marks the end point of the movement.

So:

• na náměstí = to the square
• až na náměstí = all the way to the square

Without až, the sentence would still be grammatical:

• Od knihovny jdeš dál rovně na náměstí.

But až makes the destination boundary clearer and stronger. It emphasizes that you keep going until you reach that place.

This is because Czech uses different prepositions with different places, and you often just have to learn which one goes with which noun.

With náměstí (square / town square), Czech normally uses:

• na náměstí = to the square / on the square
• na náměstí = on the square (same form in some contexts)

So in movement toward a square, na is the natural preposition.

By contrast:

• do knihovny = into the library
• do domu = into the house
• but na náměstí = to the square

This is similar to how prepositions in English are partly idiomatic too.

K means toward / up to / to the vicinity of, but it often does not imply actually arriving onto or into the place itself.

So the difference is roughly:

• k náměstí = toward the square / up to the square
• na náměstí = to the square, arriving there

In route instructions, až na náměstí clearly tells you that the square is the destination.

So na náměstí is the better choice here.

No, Czech word order is fairly flexible, but different orders sound slightly different in emphasis.

The given sentence:

• Od knihovny jdeš dál rovně až na náměstí.

is natural because it starts with the starting point (from the library) and then gives the instruction.

You could also hear:

• Jdeš od knihovny dál rovně až na náměstí.

That is also grammatical, but it shifts the focus a little.

In Czech, word order often depends on information structure—what is already known and what is being emphasized. For directions, putting the starting point first is very common.

Yes. Jdeš is informal singular, used when speaking to one person you address with ty.

If you wanted to be polite or speak to more than one person, you would use jdete:

• Od knihovny jdete dál rovně až na náměstí.

If you wanted a more direct command, you could use the imperative:

• Od knihovny jdi dál rovně až na náměstí.
• Od knihovny jděte dál rovně až na náměstí.

So the original sentence sounds like casual spoken route instructions to one person.

In this kind of sentence, jít can mean both walk and more generally go along the route on foot.

If the person is walking, jít is the natural verb.

For other kinds of travel, Czech may use different verbs:

• jedeš = you go by vehicle / ride / drive
• jdeš = you go on foot

But in everyday route explanations, especially in a town center, jdeš is a very normal choice and naturally understood.

Not perfectly. A very literal breakdown would be:

• Od knihovny = from the library
• jdeš = you go
• dál = further / on
• rovně = straight
• až = all the way / until
• na náměstí = to the square

A natural English translation would be something like:

• From the library, go straight on to the square.
• From the library, continue straight all the way to the square.

So the Czech sentence is straightforward, but the most natural English version may be a little less literal.