I carciofi costano meno dei fiori oggi, così la fidanzata di Marco ne prende due.

Italian often uses the definite article with nouns when speaking about things in a general sense.

So where English says Artichokes cost less than flowers, Italian naturally says I carciofi costano meno dei fiori.

Here:

• i = the for masculine plural nouns
• carciofi = artichokes

So i carciofi can mean artichokes in general, not only a specific set already known to the listener.

Because the subject is plural: i carciofi.

The verb costare means to cost, and it must agree with the subject:

• il carciofo costa = the artichoke costs
• i carciofi costano = the artichokes cost

So costano is the 3rd person plural form.

This is the comparative pattern for less than.

• meno = less
• di = than / of
• i fiori = the flowers
• di + i = dei

So:

• meno dei fiori = less than the flowers

A useful way to think about it is:

• meno di
  • noun phrase
• if the noun phrase has an article, di combines with it

Examples:

• meno del vino = less than the wine
• meno della frutta = less than the fruit
• meno dei fiori = less than the flowers

Because meno does not agree with the noun. It is invariable.

It stays the same with singular and plural:

• Il carciofo costa meno del fiore
• I carciofi costano meno dei fiori

The verb changes for number, but meno does not.

Not here.

In this sentence, dei is not the indefinite/partitive article meaning some. It is the contraction of:

• di + i = dei

So dei fiori here means than the flowers, not some flowers.

This is an important distinction, because dei can have different meanings depending on context.

Here così means so, therefore, or as a result.

It connects the two ideas:

• artichokes are cheaper than flowers today
• as a result, Marco’s girlfriend buys two of them

So in this sentence, così is functioning as a connector, not as like this or so much.

Italian usually expresses this kind of possession with di:

• la fidanzata di Marco = Marco’s girlfriend

English often uses 's, but Italian normally uses:

• noun + di
  • owner

Examples:

• la macchina di Luca = Luca’s car
• il libro di Anna = Anna’s book

So di Marco is the normal structure here.

You could, but it would be less clear.

La sua fidanzata means his girlfriend, but his could be ambiguous in a larger context. Italian often prefers di Marco when it wants to make the owner explicit.

So:

• la sua fidanzata = his girlfriend
• la fidanzata di Marco = Marco’s girlfriend

The second one is clearer and more precise.

Fidanzata usually means girlfriend or fiancée, depending on context.

It comes from fidanzare / fidanzarsi, related to becoming engaged. In modern everyday Italian, fidanzata is also very commonly used for girlfriend, especially in a serious relationship.

So the exact English choice depends on the situation.

Ne means of them or some of them.

It refers back to something already mentioned, here carciofi.

So:

• ne prende due = she takes two of them
• more naturally in English: she takes two

Italian often uses ne when talking about a quantity of something already known.

Examples:

• Ho delle mele. Ne mangio due. = I have some apples. I eat two of them.
• Vedi i carciofi? Ne prende due. = Do you see the artichokes? She takes two of them.

Because ne is a clitic pronoun, and clitic pronouns normally come before a conjugated verb.

So:

• ne prende
• lo vede
• mi parla

With infinitives, gerunds, and affirmative commands, pronouns can attach to the end instead:

• prenderne due = to take two of them
• prendine due! = take two of them!

But with the finite verb prende, the normal position is before the verb: ne prende.

Yes, absolutely.

• prende due carciofi = she takes two artichokes
• ne prende due = she takes two of them

The second version avoids repeating carciofi and sounds very natural once the noun has already been mentioned.

So ne is often used for smoother, less repetitive Italian.

Because due is the quantity being taken, and after ne the number usually stays after the verb:

• ne prende due
• ne voglio tre
• ne abbiamo molti

This is a very common pattern:

• ne = of them / of it
• verb
• quantity

So ne prende due literally works like of them she takes two.

Yes, oggi is flexible.

In this sentence, oggi modifies the idea cost less than flowers today. Italian adverbs of time can often move around without changing the basic meaning very much.

Possible positions include:

• Oggi i carciofi costano meno dei fiori
• I carciofi oggi costano meno dei fiori
• I carciofi costano meno dei fiori oggi

All of these are possible. The version in your sentence is natural, especially in connected speech.

Because Marco is a proper name, and proper names normally do not take an article after di in this kind of structure.

So:

• la fidanzata di Marco
• il libro di Anna

But with common nouns, di often combines with the article:

• del ragazzo = of the boy
• della ragazza = of the girl
• dei fiori = of the flowers / than the flowers

So di Marco is correct because Marco is a name, not a common noun.