Metto i jeans blu quando vado al mercato.

Metto is the 1st person singular present of mettere, which usually means to put.

In this sentence, metto i jeans blu means something like:

• I put on the blue jeans
• or more naturally in context, I wear the blue jeans

Italian often uses mettere for clothing in everyday speech. So metto i jeans is very normal.

Also, mettere is irregular in the present tense:

• io metto
• tu metti
• lui/lei mette
• noi mettiamo
• voi mettete
• loro mettono

Yes. Indossare is another common verb for clothing.

• Metto i jeans blu = I put on / I wear the blue jeans
• Indosso i jeans blu = I wear the blue jeans

The difference is mainly one of style and nuance:

• mettere is very common and everyday
• indossare sounds a bit more precise or slightly more formal

In many everyday situations, both are fine.

In Italian, nouns usually need an article much more often than in English.

So i jeans means the jeans, but in Italian that article is often used even where English would just say jeans.

Here, i jeans blu is the normal way to say the blue jeans or simply blue jeans, depending on context.

In Italian, jeans is normally treated as a masculine plural noun, so it takes plural articles and adjectives if needed.

That is why you get:

• i jeans
• not il jeans in standard everyday usage

This is similar to how English often thinks of jeans as a plural item.

Because blu is an invariable adjective in Italian.

That means it does not change for gender or number.

So you say:

• il cappello blu
• la camicia blu
• i jeans blu
• le scarpe blu

The form stays blu every time.

In Italian, most descriptive adjectives usually come after the noun.

So:

• i jeans blu = the blue jeans

This is the normal order.

Sometimes adjectives can come before the noun, but color adjectives like blu usually come after it.

Because Italian often drops subject pronouns when they are already clear from the verb ending.

• metto already means I put on / I wear
• vado already means I go

So io is not necessary.

You could say:

• Io metto i jeans blu quando vado al mercato

but that would usually add emphasis, as if you were contrasting yourself with someone else.

Al is the contraction of:

• a
  • il = al

So:

• vado al mercato = I go to the market

This kind of contraction is very common in Italian:

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

Because Italian often uses an article with places and nouns where English may not.

So English says:

• to the market
• or sometimes just to market in special expressions

But Italian normally says:

• al mercato

That is the standard form here.

Italian often uses the present tense for habitual or repeated actions, just like English can.

So quando vado al mercato means:

• when I go to the market
• whenever I go to the market

It describes a routine or usual situation, not just one specific trip.

So the whole sentence suggests a habit:

• I wear/put on the blue jeans when I go to the market

It can feel like both, depending on context.

In this sentence, because both verbs are in the present and the sentence sounds habitual, quando is often understood as:

• when
• or more naturally, whenever

So the idea is probably:

• Whenever I go to the market, I wear the blue jeans

Yes, absolutely.

Both are natural:

• Metto i jeans blu quando vado al mercato
• Quando vado al mercato, metto i jeans blu

The second version puts more focus on the time/situation first.

This kind of word order change is very common in Italian.

Both can be used, but there is a small nuance.

• metto i jeans blu = I put on / I wear the blue jeans
• mi metto i jeans blu = literally I put the blue jeans on myself

In everyday Italian, mettersi is very common for getting dressed:

• Mi metto la giacca
• Mi metto le scarpe

So mi metto i jeans blu may sound a bit more specifically like I put on the blue jeans, while metto i jeans blu can sound a bit broader and more general.

In many contexts, though, the difference is small.

Yes.

Mettere is irregular because of forms like:

• metto
• metti
• mette
• mettono

And andare is also irregular:

• vado
• vai
• va
• andiamo
• andate
• vanno

These are very common verbs, so it is worth learning their present-tense forms early.

Italian speakers usually pronounce jeans very similarly to English jeans, though the exact sound may vary a little by speaker and accent.

The rest of the sentence is pronounced roughly like this:

• Metto i jeans blu quando vado al mercato
• MEHT-toh ee jeenz bloo KWAHN-doh VAH-doh ahl mehr-KAH-toh

A few useful notes:

• metto has a clear double tt, so the consonant is held a little longer
• blu is one syllable
• quando begins with kw
• mercato has stress on ca: mer-CA-to