Sul tavolo c’è già un sottopentola di sughero vicino alla presina rossa.

Sul means on the.

It is a contraction of:

• su = on
• il = the (masculine singular)

So:

• su + il = sul

Because tavolo is masculine singular, sul tavolo is the correct form for on the table.

Italian often puts the location first when introducing something that is present somewhere.

So Sul tavolo c’è... is a very natural way to say:

• On the table, there is...
• or more naturally in English, There is ... on the table

Starting with Sul tavolo helps set the scene first.

C’è means there is.

It is used to say that something exists or is present in a place:

• C’è un libro sul tavolo = There is a book on the table

By contrast, è just means is and usually links a subject to a description:

• Il libro è rosso = The book is red

So in this sentence, c’è is correct because we are introducing the existence of un sottopentola on the table.

The apostrophe shows that ci has shortened before è.

The full form is historically:

• ci è

But in modern Italian this is written and said as:

• c’è

So c’è is the normal form meaning there is.

Già means already.

In a sentence like this, it commonly appears after c’è and before the noun phrase:

• c’è già un sottopentola...

This is a very natural Italian word order.

The idea is that the trivet is already there, not newly placed there.
So the sentence suggests something like: the table already has one on it.

Because sottopentola is a masculine noun, even though it ends in -a.

Italian nouns ending in -a are often feminine, but not always. Some nouns are exceptions, and compound nouns can behave unpredictably.

So you need to learn this word with its article:

• il sottopentola
• un sottopentola

Not una sottopentola.

Di sughero means made of cork or cork.

In Italian, di + material is a very common way to describe what something is made of:

• una tavola di legno = a wooden table / a table made of wood
• un anello d’oro = a gold ring

So:

• un sottopentola di sughero = a cork trivet

Sometimes yes, but di sughero is the most natural choice here.

Both di and in can be used with materials in some contexts, but:

• di sughero = the most straightforward way to say it is made of cork
• in sughero = possible in some situations, but less neutral here

So for this sentence, di sughero is the best choice.

Because vicino is normally followed by a when it means near.

So the pattern is:

• vicino a = near to

Since presina is feminine singular, you need:

• a + la = alla

So:

• vicino alla presina rossa = near the red potholder

In Italian, adjectives often come after the noun, especially simple descriptive adjectives like colors.

So:

• presina rossa = red potholder

This is more natural than rossa presina, which would sound unusual in normal speech.

Color adjectives especially are very commonly placed after the noun.

Because the adjective must agree with the noun in gender and number.

Presina is:

• feminine
• singular

So the adjective must also be feminine singular:

• rossa

Compare:

• il guanto rosso = masculine singular
• la presina rossa = feminine singular

They are both kitchen items, but they are used differently:

• sottopentola = a trivet, something you put on the table or counter under a hot pot or pan
• presina = a potholder, used to hold hot cookware with your hand

So in this sentence, the trivet is on the table, and it is located near the red potholder.

Yes, Italian word order is fairly flexible.

For example, you could also say:

• C’è già un sottopentola di sughero sul tavolo vicino alla presina rossa.

That is still correct.

But the original sentence:

• Sul tavolo c’è già un sottopentola di sughero vicino alla presina rossa.

sounds very natural because it starts with the location and then introduces what is there.