Se grattugio il formaggio troppo in fretta, sporco tutto il tavolo.

Se means if.

In this sentence, Italian uses the present tense in both parts to express a general or habitual result:

• Se grattugio il formaggio troppo in fretta = If I grate the cheese too fast
• sporco tutto il tavolo = I make the whole table dirty / I make a mess all over the table

So the idea is not just one specific future event, but something like whenever this happens, this is the result.

This is very natural in Italian. English can do something similar with the zero conditional:

• If I grate the cheese too fast, I make a mess all over the table.

Italian often leaves out subject pronouns when they are clear from the verb ending.

Here:

• grattugio = I grate
• sporco = I dirty / I make dirty

Both verb forms already show first person singular, so io is not necessary.

You could say Se io grattugio..., but that would usually add emphasis, such as I, personally.

Grattugio is the io form of the verb grattugiare, which means to grate.

Present tense:

• io grattugio
• tu grattugi
• lui/lei grattugia
• noi grattugiamo
• voi grattugiate
• loro grattugiano

So in the sentence, grattugio simply means I grate.

A useful thing to notice is that Italian often changes the infinitive ending -are into -o for the io form.

Italian uses the definite article much more often than English.

Here, il formaggio means the cheese. Even if English sometimes just says cheese, Italian usually prefers the article when talking about a specific item being handled in the situation.

So:

• grattugiare il formaggio = to grate the cheese

Without the article, formaggio would sound less natural here.

Troppo means too much / too, and in fretta means quickly / in a hurry.

So troppo in fretta means:

• too quickly
• too fast
• literally, something like too much in a hurry

In fretta is a very common Italian expression. You could also hear:

• velocemente = quickly
• troppo velocemente = too quickly

But in fretta sounds very natural in everyday speech.

Yes — sporco can be:

1. an adjective meaning dirty
2. a verb form meaning I dirty / I make dirty

In this sentence, it is a verb, from sporcare = to dirty / to soil / to make a mess on.

How do we know?

Because it is followed by a direct object:

• sporco tutto il tavolo

That means I dirty the whole table or more naturally I get the whole table dirty.

If it were an adjective, it would describe something, not take an object like that.

Tutto il tavolo means the whole table or the entire table.

In Italian, when tutto means whole/entire, it usually comes before the article + noun:

• tutto il tavolo = the whole table
• tutta la casa = the whole house
• tutti i libri = all the books
• tutte le sedie = all the chairs

Here:

• tutto agrees with tavolo
• tavolo is masculine singular
• so we get tutto il tavolo

Literally, yes:

• sporco tutto il tavolo = I dirty the whole table

But in more natural English, depending on context, you might say:

• I get the whole table dirty
• I make a mess all over the table
• I end up with cheese all over the table

So sporcare often has the sense of making something messy or dirty, not just staining it.

The comma separates the if-clause from the main clause:

• Se grattugio il formaggio troppo in fretta, sporco tutto il tavolo.

This is very common and helps readability.

It works just like in English when the conditional clause comes first:

• If I grate the cheese too fast, I make a mess all over the table.

Yes, Italian word order is somewhat flexible, though the original version is very natural.

Original:

• Se grattugio il formaggio troppo in fretta, sporco tutto il tavolo.

You could also say:

• Sporco tutto il tavolo se grattugio il formaggio troppo in fretta.

That still means the same thing, but it places the emphasis a bit differently.

You may also hear slight rearrangements like:

• Se grattugio troppo in fretta il formaggio, sporco tutto il tavolo.

That is also understandable, but the original order sounds smooth and normal.

In a sentence like this, se literally means if, but the overall sense can feel like whenever because the sentence describes a repeated or typical result.

So:

• Se grattugio il formaggio troppo in fretta, sporco tutto il tavolo

can be understood as:

• If I grate the cheese too fast, I make a mess all over the table
• Whenever I grate the cheese too fast, I make a mess all over the table

That habitual feeling comes from the present tense, not from se by itself.