Từ thư viện, bạn rẽ trái rồi đi thẳng đến công viên.

Here từ means from.

So Từ thư viện means From the library or Starting at the library.

Vietnamese often puts the starting point first in directions:

• Từ thư viện, ... = From the library, ...
• Từ đây, ... = From here, ...

This is very natural when giving route instructions.

The comma separates the starting location from the main instruction.

• Từ thư viện, bạn rẽ trái rồi đi thẳng đến công viên.

It works like English:

• From the library, you turn left and then go straight to the park.

In casual writing, people may sometimes omit punctuation, but the comma is helpful and natural here.

Thư viện means library.

It is a compound word:

• thư = books/writing/letters
• viện = institute/building/establishment

You do not need to translate it piece by piece in normal use; just learn thư viện as the standard word for library.

Bạn usually means you, but it is also a common neutral way to address someone.

In this sentence, bạn makes the instruction clear and friendly:

• Từ thư viện, bạn rẽ trái... = From the library, you turn left...

However, in Vietnamese, subjects are often omitted when they are obvious. So a native speaker might also say:

• Từ thư viện, rẽ trái rồi đi thẳng đến công viên.

That sounds very natural in directions too.

Yes. Rẽ trái is a standard and very common way to say turn left.

• rẽ = turn
• trái = left

You will also hear:

• quẹo trái = turn left

Both are common, but usage can vary by region. Rẽ trái is widely understood everywhere.

Rồi here means then, and then, or marks the next action in a sequence.

So:

• rẽ trái rồi đi thẳng = turn left and then go straight

It helps show the order of actions:

1. rẽ trái
2. đi thẳng đến công viên

In spoken Vietnamese, rồi is very common for linking steps in instructions.

No, not in this sentence.

Rồi can have different meanings depending on context:

• sequence: then / and then
• completion: sometimes similar to already / done

Here it clearly marks sequence:

• rẽ trái rồi đi thẳng = turn left, then go straight

So already would be the wrong meaning here.

Đi thẳng means go straight.

• đi = go
• thẳng = straight

It is a very common phrase in directions:

• Đi thẳng. = Go straight.
• Đi thẳng một chút. = Go straight a little farther.
• Đi thẳng đến công viên. = Go straight to the park.

Đến means to, until, or arrive at, depending on context.

Here it marks the destination:

• đi thẳng đến công viên = go straight to the park

Without đến, đi thẳng công viên would not sound right in standard Vietnamese.

You may also hear:

• đi thẳng tới công viên

Here đến and tới are very close in meaning.

In route directions, đến and tới are often interchangeable.

So these are both natural:

• đi thẳng đến công viên
• đi thẳng tới công viên

Very generally:

• đến can sound a little more neutral or standard
• tới is also very common in speech

For a learner, either is fine in this sentence.

Vietnamese often presents direction instructions in a very step-by-step order:

• Từ thư viện = starting point
• bạn rẽ trái = first action
• rồi đi thẳng = next action
• đến công viên = destination

So the structure is roughly: From X, you do A, then do B, to reach Y.

This is normal Vietnamese word order and sounds natural.

Công viên is the normal word for park, especially a public park.

Examples:

• công viên = park
• công viên lớn = big park
• ra công viên = go to the park

So in this sentence, đến công viên simply means to the park.

Vietnamese does not use articles like a, an, and the the way English does.

So:

• thư viện can mean a library or the library
• công viên can mean a park or the park

The exact meaning comes from context. In directions, the listener usually already knows which library and park are meant.

Yes, definitely.

In directions, it is very common to omit the subject:

• Từ thư viện, rẽ trái rồi đi thẳng đến công viên.

This can sound even more natural and direct, like English From the library, turn left, then go straight to the park.

Including bạn is still correct; it just makes the sentence a little more explicitly addressed to the listener.

Rẽ has the ngã tone.

Important tone points in this sentence:

• từ = huyền tone
• rẽ = ngã tone
• trái = sắc tone
• thẳng = nặng tone
• đến = sắc tone

For learners, rẽ can be tricky because the ngã tone is not easy for English speakers. It is best to listen to native audio and imitate it rather than rely only on English-style spelling.

Yes, this sentence is completely natural.

A few common real-life variations are:

• Từ thư viện, bạn rẽ trái rồi đi thẳng đến công viên.
• Từ thư viện, rẽ trái rồi đi thẳng đến công viên.
• Từ thư viện, quẹo trái rồi đi thẳng tới công viên.

All of these work. The differences are mostly about:

• whether the subject bạn is included
• whether the speaker says rẽ or quẹo
• whether they use đến or tới

You can simply omit bạn:

• Từ thư viện, rẽ trái rồi đi thẳng đến công viên.

This sounds like a direct instruction:

• From the library, turn left, then go straight to the park.

If you want to sound a little softer or more polite in conversation, keeping bạn is also fine.