Μετά το μάθημα κουβεντιάζω συχνά με τη φίλη μου στο ζαχαροπλαστείο δίπλα στο φροντιστήριο.

Greek often leaves out subject pronouns because the verb ending already shows who the subject is.
Here, κουβεντιάζω ends in -ω, which tells you it means I chat / I talk.

You can add εγώ if you want emphasis, contrast, or extra clarity, but in a neutral sentence it is usually omitted.

In Greek, the present tense is used both for:

• actions happening now
• habitual or repeated actions

So κουβεντιάζω συχνά naturally means I often chat. The word συχνά makes it clear that this is a usual habit, not just something happening at this exact moment.

They are close, but not identical.

• κουβεντιάζω = chat, have a conversation, talk with someone
• μιλάω = speak, talk

In this sentence, κουβεντιάζω feels very natural because the idea is casual conversation with a friend. It sounds a bit more specifically conversational than μιλάω.

Both are possible in Modern Greek.

• μετά το μάθημα
• μετά από το μάθημα

The shorter version, μετά το μάθημα, is very common and completely natural. Adding από is also correct, but it is not required here.

Because μετά meaning after takes the accusative in Modern Greek.

So the noun after it should be in the accusative case.
With μάθημα, which is a neuter noun, the nominative and accusative singular look the same:

• nominative: το μάθημα
• accusative: το μάθημα

So the form does not visibly change, even though the case is accusative.

Greek uses the definite article more often than English does. So expressions that sound article-less in English often use an article in Greek.

That means you should not expect article usage to match English word for word.
Here, μετά το μάθημα is the normal Greek way to say after class / after the lesson.

Greek word order is more flexible than English word order.
Κουβεντιάζω συχνά is a very natural order, but other placements are also possible, such as:

• Συχνά κουβεντιάζω...
• Κουβεντιάζω με τη φίλη μου συχνά...

The meaning stays basically the same, but the emphasis may shift slightly. The original version sounds neutral and natural.

There are two important things here:

1. με means with and takes the accusative.
2. μου means my and usually comes after the noun in Greek.

So:

• η φίλη = the friend
• τη φίλη = accusative form after με
• η φίλη μου = my friend
• με τη φίλη μου = with my friend

This post-noun possessive pattern is very common in Greek.

The full feminine accusative article is την, but the final -ν is often dropped before many consonants.

Since φίλη begins with φ, Greek normally uses:

• τη φίλη

You will very often keep the final -ν before vowels and before certain consonants such as κ, π, τ, ξ, ψ and often μπ, ντ, γκ.

So τη φίλη is the expected everyday form here.

στο is a contraction of:

• σε + το = στο

The preposition σε can mean:

• in
• at
• to

depending on context.

So στο ζαχαροπλαστείο can mean at the pastry shop or in the pastry shop here. It does not have to mean movement toward it.

ζαχαροπλαστείο is a pastry shop, cake shop, or confectionery.

It is a very Greek everyday word, and depending on the place, it can be somewhere you:

• buy sweets, cakes, and pastries
• sometimes sit and have dessert or coffee

The ending -είο is very common in neuter nouns for places or establishments.

δίπλα means next to / beside. It is commonly followed by σε + accusative.

So:

• δίπλα σε το φροντιστήριο becomes
• δίπλα στο φροντιστήριο

This whole phrase tells you where the pastry shop is located: it is next to the tutoring center.

In Greek, φροντιστήριο usually means a private tutoring center or cram school, often for:

• school support
• foreign languages
• exam preparation

This is a very common institution in Greece, so it is a culturally important everyday word. It does not mean exactly the same thing as a regular school.

In this sentence, it most naturally describes the pastry shop.

So the structure is basically:

• I often chat with my friend
• at the pastry shop
• the pastry shop that is next to the tutoring center

In other words, δίπλα στο φροντιστήριο gives extra information about the location ζαχαροπλαστείο.

Yes. Greek allows much more movement of sentence parts than English because articles and endings help show the grammar.

For example, these are possible:

• Μετά το μάθημα συχνά κουβεντιάζω με τη φίλη μου...
• Στο ζαχαροπλαστείο δίπλα στο φροντιστήριο κουβεντιάζω συχνά...

The original sentence sounds natural and neutral, but other orders are possible if you want to emphasize time, place, or frequency.