Βρήκα μια πέτρα στον δρόμο.

Βρήκα is the 1st person singular aorist of βρίσκω (to find).

So it means I found.

A few useful points:

• βρίσκω = I find / I am finding
• βρήκα = I found

The aorist is the normal past tense for a completed action in Greek.

Because πέτρα is a feminine singular noun.

Greek indefinite articles change for gender:

• ένας = a/an for masculine nouns
• μια / μία = a/an for feminine nouns
• ένα = a/an for neuter nouns

Since πέτρα is feminine, you need μια.

They both mean a / one for feminine nouns.

The difference is mainly:

• μια is the very common everyday spelling
• μία is a more careful or formal spelling, and it can also help show emphasis on one

So in this sentence, μια πέτρα is perfectly normal.

In this sentence, πέτρα is the direct object of βρήκα, so it is in the accusative case.

However, for many feminine nouns like πέτρα, the nominative singular and accusative singular look the same:

• nominative: η πέτρα
• accusative: την πέτρα

So yes, it is accusative here, but the noun itself does not visibly change.

στον is a contraction of:

• σε = in, on, at, to
• τον = the (masculine accusative singular)

So:

• σε + τον = στον

In this sentence, στον δρόμο means something like in/on the road or in/on the street, depending on the English translation and context.

Because after στον, the noun is in the accusative singular.

The dictionary form is:

• ο δρόμος = the road / street

But the accusative singular is:

• τον δρόμο

So:

• nominative: δρόμος
• accusative: δρόμο

This is very common with masculine nouns ending in -ος.

In Modern Greek, σε normally takes the accusative case.

So:

• σε έναν δρόμο
• στον δρόμο
• σε μια πόλη
• στο σπίτι

Even when English uses in, on, at, or to, Greek often uses σε + accusative.

Yes, you may hear στο δρόμο in everyday speech and writing.

That happens because the final -ν in forms like τον / στον can sometimes be dropped before certain consonants.

So:

• στον δρόμο = full form
• στο δρόμο = very common reduced form

Both are used, but στον δρόμο is especially clear for learners because it shows the underlying σε + τον more clearly.

Yes, Greek word order is more flexible than English.

This version is a very natural neutral order:

• Βρήκα = I found
• μια πέτρα = a stone
• στον δρόμο = in/on the road

But you could also move things around for emphasis, for example:

• Στον δρόμο βρήκα μια πέτρα = It was on the road that I found a stone
• Μια πέτρα βρήκα στον δρόμο = A stone is what I found on the road

The basic meaning stays the same, but the emphasis changes.

Greek σε / στον covers several ideas that English splits into different prepositions.

So στον δρόμο can correspond to:

• on the road
• in the road
• in the street
• sometimes even to the road, in other contexts

The exact English wording depends on context. Greek uses the same structure much more broadly.

A simple pronunciation guide is:

VRI-ka mia PE-tra ston THRO-mo

More exactly:

• Βρήκα ≈ VREE-ka
• μια ≈ mya
• πέτρα ≈ PE-tra
• στον ≈ ston
• δρόμο ≈ THRO-mo (with δ pronounced like th in this)

Stress falls on:

• ΒΡΗ-κα
• ΠΕ-τρα
• ΔΡΟ-μο

Not normally, if you mean I found a stone.

Greek usually wants the article with a singular count noun here:

• μια πέτρα = a stone

If you say Βρήκα πέτρα, it sounds less natural in most ordinary contexts, or it may suggest a more general/material meaning rather than one specific stone.

So for normal everyday Greek, Βρήκα μια πέτρα στον δρόμο is the best choice.

They are:

• βρίσκω = to find
• πέτρα = stone
• δρόμος = road / street

In the sentence, some of them appear in changed forms:

• βρίσκω → βρήκα (past tense)
• δρόμος → δρόμο (accusative singular)

This is very normal in Greek, so it is always useful to learn both the dictionary form and the form used in real sentences.