Ο πλάστης είναι πάνω στον πάγκο, αλλά η λαδόκολλα είναι ακόμα στο ντουλάπι.

They use different prepositional patterns:

• πάνω σε
  • noun = on / on top of
• σε
  • noun = in / at / on, depending on context

So:

• πάνω στον πάγκο = on the counter
• στο ντουλάπι = in the cupboard

Also, στον and στο are contractions:

• σε + τον = στον
• σε + το = στο

So πάνω στον πάγκο literally contains σε too:
πάνω σε τον πάγκο → πάνω στον πάγκο

Because after σε and πάνω σε, Greek uses the accusative case.

So the dictionary forms are:

• ο πάγκος → accusative τον πάγκο
• το ντουλάπι → accusative το ντουλάπι

For neuter nouns like ντουλάπι, the nominative and accusative are often the same, so you do not see a change in the noun itself.

This is very common in Modern Greek with location after σε:

• στο σπίτι
• στο τραπέζι
• στο ντουλάπι

Greek nouns have grammatical gender, and the article must match the noun.

Here:

• ο πλάστης is masculine
• η λαδόκολλα is feminine
• ο πάγκος is masculine
• το ντουλάπι is neuter

In Greek, gender is something you usually learn together with the noun, not separately. So it is best to memorize vocabulary as:

• ο πλάστης
• η λαδόκολλα
• ο πάγκος
• το ντουλάπι

That will help you use the correct articles and case forms later.

Here ακόμα means still.

So η λαδόκολλα είναι ακόμα στο ντουλάπι means the baking/parchment paper is still in the cupboard.

Depending on context, ακόμα can also mean things like yet or even more, but in this sentence still is the natural meaning.

Yes, it could, but the meaning would be slightly different.

• στον πάγκο = at/on the counter
• πάνω στον πάγκο = on top of the counter

In many everyday situations, both are possible.
But πάνω makes the physical position more explicit: the rolling pin is on top of the counter, not inside it or somewhere associated with it.

αλλά means but.

It connects the two parts of the sentence:

• Ο πλάστης είναι πάνω στον πάγκο
• αλλά
• η λαδόκολλα είναι ακόμα στο ντουλάπι

Its position works much like English but.
The comma before it is also normal, just as in English.

Because the sentence has two separate clauses, and each one has its own verb:

• Ο πλάστης είναι πάνω στον πάγκο
• η λαδόκολλα είναι ακόμα στο ντουλάπι

Greek can sometimes omit repeated material, but in a basic sentence like this, repeating είναι is normal and clear.

Greek often drops subject pronouns like εγώ, εσύ, αυτός, because the verb ending already gives information.

But here the subjects are full nouns:

• ο πλάστης
• η λαδόκολλα

Those are not usually dropped unless the context already makes them completely obvious and the speaker is intentionally shortening the sentence.

So this sentence is natural as written.

It is a compound noun, written as one word.

It comes from:

• λάδι = oil
• κόλλα = paper/sheet/glue-related word depending on context and history

In modern everyday Greek, λαδόκολλα means greaseproof paper / baking paper / parchment paper, depending on context.

So even if the parts are interesting, you should learn η λαδόκολλα as a fixed vocabulary item.

Yes, in a kitchen context ο πλάστης means rolling pin.

The word can come from the idea of shaping or molding, but in this sentence, with counter and baking paper, the kitchen meaning is clearly the right one.

A simple pronunciation guide:

• πλάστης → PLAS-tees
• λαδόκολλα → la-THO-ko-la
• πάνω στον πάγκο → PA-no ston PA-go
• ντουλάπι → doo-LA-pee

A few notes:

• στ sounds like st
• γκ in πάγκο is pronounced like a g sound here
• ντ in ντουλάπι sounds like d
• The accent mark shows the stressed syllable:
  • πλάστης
  • λαδόκολλα
  • πάνω
  • πάγκο
  • ντουλάπι

This sentence uses a very straightforward word order:

• subject + verb + location
• then but
• then subject + verb + adverb + location

That is common and natural in Greek, especially in simple descriptive sentences.

However, Greek word order is often more flexible than English because case endings and articles help show what each noun is doing. So Greek can move words around for emphasis more easily.

For example, a speaker could shift things for emphasis, but the version you have is the most neutral and learner-friendly one.

Yes. μέσα στο ντουλάπι means inside the cupboard.

Compare:

• στο ντουλάπι = in the cupboard
• μέσα στο ντουλάπι = inside the cupboard

The version with μέσα is a bit more explicit.
Without μέσα, Greek still naturally understands that the paper is in the cupboard, not just somehow associated with it.

A few very useful chunks are:

• πάνω σε = on / on top of
• στο / στον / στην = in, at, to, on depending on context
• είναι ακόμα... = is still...
• αλλά... = but...

And with the nouns, memorize them with articles:

• ο πλάστης
• η λαδόκολλα
• ο πάγκος
• το ντουλάπι

That gives you both vocabulary and grammar at the same time.