Marta mastica lentamente quando il pane è duro.

Mastica is the 3rd person singular present tense of masticare (to chew).

Because the subject is Marta, the verb has to match she:

• io mastico = I chew
• tu mastichi = you chew
• lui/lei mastica = he/she chews

So Marta mastica means Marta chews.

Italian often drops subject pronouns when they are not needed, because the verb ending already shows the person.

Here, the subject is already clearly given as Marta, so adding lei would usually be unnecessary:

• Marta mastica lentamente = normal
• Lei mastica lentamente = possible, but only if you want to emphasize she

This is very different from English, where you normally must say the subject.

Lentamente is an adverb, and it means slowly.

It comes from the adjective lento / lenta (slow) plus -mente, which often works like English -ly:

• lento = slow
• lentamente = slowly

So:

• Marta mastica lentamente = Marta chews slowly

That is a very common position for adverbs in Italian. Putting lentamente after mastica sounds natural and straightforward.

• Marta mastica lentamente = very normal

Italian word order is often flexible, but this version is the most neutral. You could sometimes move the adverb for emphasis, but learners should treat verb + adverb as a safe pattern.

Quando literally means when, but in sentences like this it often has the sense of whenever or when(ever).

Here the sentence describes a habitual situation, not one single moment in time:

• Marta mastica lentamente quando il pane è duro.

This means something like:

• Marta chews slowly when/whenever the bread is hard.

So quando can introduce a repeated condition in everyday statements.

Both mastica and è are in the present indicative because the sentence expresses a general habit or usual truth.

Italian often uses the present tense for this kind of idea:

• Marta mastica lentamente = Marta chews slowly
• il pane è duro = the bread is hard

Together, they describe what happens in that situation in general, not just right now.

Italian often uses the definite article with nouns in a more general way than English does.

So while English may say:

• Bread is hard
• When bread is hard

Italian often prefers:

• il pane è duro

Here il pane can mean the bread or bread in general / the bread being talked about, depending on context.

This is a very common difference between Italian and English.

Because pane is a masculine singular noun, the adjective has to agree with it:

• il pane = masculine singular
• duro = masculine singular form of hard

Compare:

• il pane è duro
• la mela è dura

Italian adjectives must agree in gender and number with the noun they describe.

The accent in è is important because it distinguishes the verb è (is) from e (and).

• è = is
• e = and

So:

• il pane è duro = the bread is hard
• pane e formaggio = bread and cheese

This is a very common spelling point in Italian.

In this sentence, duro most naturally means hard in texture, especially for food like bread.

So it can suggest bread that is:

• firm
• tough to chew
• stale/hardened

The exact nuance depends on context, but here it clearly describes the bread’s texture, not something abstract like hard/difficult.

Yes, absolutely. That is also correct.

Italian can place the quando clause first:

• Quando il pane è duro, Marta mastica lentamente.

This version gives a bit more attention to the condition first. The original version starts with Marta, so it focuses first on her action.

Both are natural; the difference is mainly one of emphasis and flow.

In mastica, the c is hard, like the c in cat.

That is because c before a, o, u is normally hard in Italian:

• ca, co, cu = hard k sound

So mastica sounds roughly like MAS-ti-ka.

This is useful to notice because c before e or i is usually soft instead.