Ako vidiš vreću pokraj ograde, donesi je u vrt.

Croatian often leaves out subject pronouns because the verb ending already shows who the subject is.

• vidiš = you see
• donesi = bring! said to one person

So Ako vidiš... already means If you see... without needing ti.

You can add ti for emphasis, but normally it is omitted:

• Ako ti vidiš... would sound emphatic, like if you see...

Because vidiš is the 2nd person singular present tense of vidjeti / vidjeti-type verb meaning to see.

• ja vidim = I see
• ti vidiš = you see
• on/ona vidi = he/she sees

Since the sentence is speaking to one person, Croatian uses vidiš.

After ako (if), Croatian normally uses the present tense for a real or possible condition, even when English might be talking about the future.

So:

• Ako vidiš... = If you see...
• literally, it is present tense, but it refers to a possible future situation

This is completely normal in Croatian. You do not usually use the future tense here.

Because vreću is the accusative singular form of vreća.

• vreća = nominative, the basic dictionary form
• vreću = accusative, used here because it is the direct object of vidiš

In Ako vidiš vreću..., the bag is the thing being seen, so it must be in the accusative.

Ograde is genitive singular of ograda (fence).

It is in the genitive because the preposition pokraj requires the genitive:

• pokraj ograde = next to / beside the fence

So:

• ograda = fence
• pokraj ograde = beside the fence

No. Croatian has several common options, including:

• pokraj
• pored
• sometimes kraj

All of them can mean something like beside / next to / by.

So these are very similar:

• pokraj ograde
• pored ograde
• kraj ograde

There can be slight style or regional preferences, but pokraj is perfectly natural here.

Because donesi is the imperative form: bring!

• donijeti = to bring
• donesi = bring! (said to one person)

This verb is a bit irregular in form, so the imperative does not look exactly like the infinitive.

Compare:

• donijeti = to bring
• donesem = I bring / I will bring
• donesi! = bring!

Because donijeti / donesi means bring in the sense of take something to a destination.

• nositi = to carry, to be carrying
• donijeti = to bring (and complete the action)

In this sentence, the speaker wants one completed action:

1. see the bag
2. bring it into the garden

That is why the perfective verb donijeti is a natural choice.

Je here is an unstressed object pronoun meaning it. It refers back to vreću (the bag).

So:

• donesi je = bring it

Because vreća is a feminine singular noun, the pronoun is the feminine singular object form.

You may also encounter ju in similar sentences. In standard Croatian, je is very common here.

Croatian short pronouns like je are clitics. They usually cannot stand alone and tend to appear in an early position in their clause, often after the first stressed word.

So:

• donesi je is normal
• je donesi is not normal

This word order is part of a broader Croatian clitic pattern.

Because Croatian uses different cases after u depending on whether there is movement or location.

• u vrt = into the garden → movement toward a place → accusative
• u vrtu = in the garden → location, being inside a place → locative

Here the meaning is movement: bring it into the garden. So u vrt is correct.

Not if the meaning is bring it into the garden.

• donesi je u vrt = bring it into the garden
• je je u vrtu would mean it is already in the garden, which is a different idea

So in this sentence, u vrt is the right form because the action ends with the bag moving there.

The comma separates the conditional clause from the main clause:

• Ako vidiš vreću pokraj ograde, = if you see the bag beside the fence,
• donesi je u vrt. = bring it into the garden.

This is similar to English punctuation with an opening if-clause.

Yes, Croatian word order is fairly flexible, but not completely free.

For example, you could move some parts for emphasis:

• Ako pokraj ograde vidiš vreću, donesi je u vrt.

That said, the original sentence is the most neutral and natural.

One important point: clitics like je still have restrictions, so you cannot move everything however you want.

Yes. The sentence uses a very natural aspect combination:

• vidiš = imperfective/present idea, referring to the situation if you happen to see
• donesi = perfective imperative, meaning complete the action of bringing

This is common in Croatian:

• a condition is stated with a present verb
• the command uses a perfective verb when the speaker wants a single completed result

So the sentence sounds natural and goal-oriented: if you see it, bring it.