Pogrešno si privezao jahtu.

Pogrešno means wrongly, incorrectly, or the wrong way.

In this sentence, it is an adverb, so it describes how the action was done:

• Pogrešno si privezao jahtu. = You tied/moored the yacht incorrectly.

It comes from the adjective pogrešan = wrong / incorrect.

Si is the 2nd person singular form of the auxiliary verb biti (to be) used to form the past tense in Croatian.

So:

• si = you have / past-tense helper
• privezao = past participle

Together:

• si privezao = you tied up / you moored

This is the normal Croatian perfect tense structure:

• auxiliary biti
• • past participle

Examples:

• si privezao = you tied
• si rekao = you said
• si došao = you came

Privezao is the past participle of the verb privezati.

Privezati means:

• to tie up
• to fasten
• in a nautical context, to moor

So:

• privezao = tied up / moored

In this sentence, privezao jahtu means tied up the yacht or moored the yacht.

Because privezati is a perfective verb. Perfective verbs usually describe a completed action.

So privezao suggests:

• the action was completed
• the yacht was tied up/moored, but in the wrong way

By contrast, privezivao would come from an imperfective verb and would suggest something more like:

• was tying up
• used to tie up
• was in the process of tying up

Here, Croatian is focusing on the completed result, so privezao is the natural form.

Because jahtu is the accusative singular form, and the yacht is the direct object of the verb.

The dictionary form is:

• jahta = yacht

But after a transitive verb like privezati (to tie up / moor), you need the direct object in the accusative:

• jahta → nominative
• jahtu → accusative

So:

• Privezao si jahtu. = You tied up the yacht.

This is very common with feminine nouns ending in -a:

• kuća → kuću
• žena → ženu
• jahta → jahtu

Because Croatian usually does not need an explicit subject pronoun when the verb already shows who the subject is.

Here, si already tells you the subject is you singular.

So:

• Pogrešno si privezao jahtu. = You tied up the yacht incorrectly.

You could add ti for emphasis:

• Ti si pogrešno privezao jahtu.

That sounds more like:

• You are the one who tied up the yacht incorrectly.

So the pronoun is usually omitted unless you want emphasis or contrast.

Yes. Privezao is the masculine singular past participle.

So this sentence is addressed to:

• one man, or
• someone spoken to using the masculine form

If you were speaking to a woman, you would say:

• Pogrešno si privezala jahtu.

So:

• privezao = masculine
• privezala = feminine

This is a very important feature of Croatian past tense: the participle agrees with the subject in gender and number.

Because si is a clitic, and Croatian clitics usually go in the second position of the clause.

That means they tend to come very early in the sentence, not just anywhere.

So this is natural:

• Pogrešno si privezao jahtu.

But this is not natural:

• Pogrešno privezao si jahtu.

A useful rule for learners is:

• forms like sam, si, je, smo, ste, su usually appear near the beginning of the sentence
• they often come after the first stressed element

Croatian word order is flexible, but clitic placement follows special rules.

Yes, Croatian word order is fairly flexible, but the meaning focus changes a little.

Possible versions include:

• Pogrešno si privezao jahtu.
  Neutral: You tied up the yacht incorrectly.

• Jahtu si pogrešno privezao.
  More focus on the yacht.

• Ti si pogrešno privezao jahtu.
  More emphasis on you.

What usually stays important is the clitic placement:

• si still wants to be in the second-position area

So not every rearrangement is equally natural.

Both can work, depending on context.

• tied up the yacht is a more literal, everyday translation
• moored the yacht is more natural in nautical or formal English

So this sentence could mean:

• You tied up the yacht incorrectly.
• You moored the yacht incorrectly.

If the context is clearly about boats and docking, moored is often the best English choice.

Then the auxiliary and participle would change to plural.

If speaking to a mixed group or a group of men:

• Pogrešno ste privezali jahtu.

If speaking only to women:

• Pogrešno ste privezale jahtu.

So:

• si = you singular
• ste = you plural

And the participle also changes:

• privezao = masculine singular
• privezali = masculine/mixed plural
• privezale = feminine plural

You make it negative by changing si to nisi:

• Nisi pogrešno privezao jahtu.

Grammatically, that means:

• You did not tie up the yacht incorrectly

But depending on context, that can sound a little unusual in English, because it suggests:

• you did tie it up, just not incorrectly

If you want to say You tied up the yacht badly as a straightforward criticism, the original positive sentence is more natural:

• Pogrešno si privezao jahtu.