Quando arrivo presto al mercato, il fruttivendolo mi tiene da parte l’uva più fresca.

In Italian, subject pronouns are often omitted because the verb ending already shows who the subject is.

• arrivo = I arrive
• The -o ending tells you it is I

So Quando arrivo... naturally means When I arrive... without needing io.

You could say Quando io arrivo..., but that usually adds emphasis or contrast, such as:

• Quando arrivo io, tutto cambia. = When I arrive, everything changes.

In your sentence, io is unnecessary.

Italian often uses the present tense to describe habitual actions or things that usually happen.

So:

• Quando arrivo presto al mercato... means When I arrive early at the market...
• It suggests something that happens regularly or typically

This is very similar to English:

• When I get there early, the fruit seller saves me the freshest grapes.

It is not necessarily talking about one specific future moment. It describes a routine.

Presto means early here.

So:

• arrivo presto = I arrive early

In Italian, adverbs like presto often come after the verb, especially in simple sentences. That makes arrivo presto the most natural order.

You may also hear different word orders for emphasis, but arrivo presto is the standard, neutral phrasing.

Al is the combination of:

• a = to / at
• il = the

So:

• al mercato = at the market or to the market, depending on context

This is a normal Italian contraction:

• a + il = al

Other common ones are:

• a + lo = allo
• a + la = alla
• a + i = ai
• a + gli = agli
• a + le = alle

Fruttivendolo means a fruit seller or greengrocer, depending on context.

It is made up historically from words related to:

• frutta = fruit
• vendere = to sell

So il fruttivendolo is the man who sells fruit, and often vegetables too in everyday usage.

The feminine form is:

• la fruttivendola

Mi is an indirect object pronoun here, meaning for me or to me, depending on the sentence.

So:

• il fruttivendolo mi tiene da parte... = the fruit seller sets aside ... for me

Italian object pronouns usually come before the conjugated verb:

• mi parla = he speaks to me
• mi scrive = he writes to me
• mi tiene da parte l’uva = he keeps the grapes aside for me

English often puts this idea later:

• He sets aside the grapes for me But Italian expresses it neatly with mi before the verb.

Tenere da parte is an expression meaning:

• to keep aside
• to set aside
• to save for someone

In this sentence:

• mi tiene da parte l’uva più fresca = he sets aside the freshest grapes for me

It is a very natural expression in Italian.

A few examples:

• Ti tengo da parte un posto. = I’ll save you a seat.
• Mi tieni da parte quel libro? = Will you keep that book aside for me?

So it is not just literal hold to the side; it is an idiomatic everyday phrase.

The base article is la because uva is a feminine singular noun.

But before a vowel, la usually becomes l’:

• la uva → l’uva

This is called elision.

Other examples:

• l’acqua = the water
• l’amica = the female friend
• l’ora = the hour

So l’uva is simply the normal form of the grapes / the grape(s) in Italian.

Italian often uses uva as a collective singular noun to mean grapes in general.

So:

• l’uva = grapes / the grapes

This is one of those places where Italian and English organize the idea differently.

Compare:

• Mangio l’uva. = I eat grapes.
• L’uva è fresca. = The grapes are fresh.

Even though English usually uses the plural, Italian commonly uses the singular collective noun.

Più fresca must agree with l’uva, which is:

• feminine
• singular

So the adjective also becomes:

• fresca = feminine singular

That gives:

• l’uva più fresca = the freshest grapes / the fresher grapes, depending on context

Agreement patterns:

• fresco = masculine singular
• fresca = feminine singular
• freschi = masculine plural
• fresche = feminine plural

Since uva is feminine singular, fresca is the correct form.

It can literally look like fresher, because più + adjective often means more + adjective.

But in context, l’uva più fresca usually means the freshest grapes or the freshest bunch/selection of grapes.

Italian often uses this structure where English prefers a superlative translation.

So:

• più fresca = literally more fresh
• but here it naturally means the freshest

Context tells you that the seller is setting aside the best, freshest grapes for the speaker.

The first part of the sentence is a subordinate clause introduced by quando:

• Quando arrivo presto al mercato = When I arrive early at the market

Then comes the main clause:

• il fruttivendolo mi tiene da parte l’uva più fresca

A comma is commonly used when this kind of time clause comes first, just as in English:

• When I arrive early at the market, the fruit seller...

If the order were reversed, the comma would often disappear:

• Il fruttivendolo mi tiene da parte l’uva più fresca quando arrivo presto al mercato.

Yes, but it would sound a bit different.

• mi tiene da parte l’uva più fresca is the most natural and compact way to say he sets aside the freshest grapes for me
• tiene da parte per me l’uva più fresca is also possible, but more explicit and slightly heavier

Italian often prefers the pronoun mi when the beneficiary is clear.

So the original sentence sounds very natural and idiomatic.