Quando inizio a tossire, bevo acqua fresca.

Quando means when. In this sentence, it introduces a time clause: Quando inizio a tossire = When I start coughing / When I begin to cough.

Here it does not mean a specific one-time moment only. In the present tense, it can also describe a repeated or usual situation:

• Quando studio, spengo il telefono. = When I study, I turn off my phone.

So in your sentence, quando suggests a habitual pattern: whenever this happens, I do that.

Because iniziare is normally followed by a + infinitive when it means to begin/start doing something.

So:

• iniziare a tossire = to start coughing
• iniziare a parlare = to start speaking
• iniziare a lavorare = to start working

This is very common in Italian. English often uses to after start/begin, but Italian uses a in this structure.

Italian often uses the present tense for actions that happen regularly or generally, just like English can do:

• When I start coughing, I drink cool water.

This is a general habit, not necessarily something happening right this second. So the present tense works perfectly:

• inizio = I begin / I start
• bevo = I drink

If you wanted to talk about one specific past event, you would use past tenses instead.

Italian usually drops subject pronouns when they are not needed, because the verb ending already shows who the subject is.

• inizio clearly means I begin
• bevo clearly means I drink

So io is optional. You could say:

• Quando io inizio a tossire, bevo acqua fresca

but that sounds more emphatic, as if you are stressing I. In normal speech, leaving it out is more natural.

Because after inizio a, Italian uses the infinitive form of the second verb.

• inizio = the conjugated verb
• a tossire = infinitive phrase

So:

• inizio a tossire = I start to cough

If you said tossisco, that would be a fully conjugated verb meaning I cough, and it would not fit after inizio a.

Compare:

• Tossisco. = I cough.
• Inizio a tossire. = I start coughing.

In Italian, when talking about something in a general or indefinite way, the article is often omitted with uncountable nouns like acqua.

So:

• bevo acqua fresca = I drink cool water

This sounds natural and general.

You could also hear:

• bevo dell'acqua fresca

This means something like I drink some cool water and is also correct. It just sounds a little more explicitly partitive/indefinite.

Here fresca means cool or fresh, depending on context. With water, English often prefers cool water.

So:

• acqua fresca = cool water / fresh water

In everyday Italian, fresco/fresca often refers to temperature, especially for drinks and air:

• aria fresca = cool air
• pane fresco = fresh bread

So the exact English word can change with context.

In Italian, adjectives usually come after the noun.

So:

• acqua fresca = cool water
• casa grande = big house
• vino rosso = red wine

Some adjectives can come before the noun, but the normal position for a descriptive adjective like fresca is after the noun.

Also, fresca changes form to agree with acqua, which is feminine singular:

• acqua = feminine singular
• fresca = feminine singular adjective form

Yes. Cominciare and iniziare are often interchangeable here.

So both are natural:

• Quando inizio a tossire, bevo acqua fresca.
• Quando comincio a tossire, bevo acqua fresca.

Both mean basically the same thing: When I start coughing, I drink cool water.

The comma is normal and helpful because the sentence begins with a subordinate clause:

• Quando inizio a tossire, bevo acqua fresca.

In Italian, a comma is commonly used after an introductory clause like this. If you reverse the order, you will often see no comma, or the punctuation may feel less necessary:

• Bevo acqua fresca quando inizio a tossire.

Both orders are correct. The original version simply puts the time condition first.

Yes, absolutely. In English, when and whenever can both fit depending on how you interpret the sentence.

Because the Italian uses the present tense and describes a general pattern, a very natural interpretation is:

• Whenever I start coughing, I drink cool water.

So even though the Italian word is quando, the overall meaning can be habitual, not just one isolated event.

Bere is the verb to drink. Its io form in the present tense is bevo.

Present tense of bere:

• io bevo = I drink
• tu bevi = you drink
• lui/lei beve = he/she drinks
• noi beviamo = we drink
• voi bevete = you all drink
• loro bevono = they drink

So in the sentence, bevo clearly tells you the subject is I, even without io.

Yes, the double ss matters in Italian. Consonant length is important.

Tossire is pronounced roughly like tohs-SEE-reh, with a stronger, longer ss than in a single s sound.

A helpful breakdown:

• to- as in a short open toh
• -ssi- stressed on -si-
• -re pronounced reh

The stress falls on -si-: tos-SI-re.

Paying attention to double consonants is important in Italian because they can change how a word sounds, and sometimes meaning too.