Tocca a te lanciare il dado.

Tocca a te means it’s your turn or it’s up to you.

Literally, toccare usually means to touch, but in this expression toccare a qualcuno means to fall to someone’s turn / to be someone’s responsibility.

So:

• Tocca a me = it’s my turn
• Tocca a te = it’s your turn
• Tocca a lui/lei = it’s his/her turn

In this sentence, Tocca a te lanciare il dado = It’s your turn to roll the die.

Because the verb pattern is toccare a qualcuno.

Italian uses a before the person whose turn it is:

• Tocca a me
• Tocca a te
• Tocca a noi

So te alone would be wrong here. The a is required by the expression.

Because it works like English to + verb after expressions such as it’s your turn.

So:

• Tocca a te lanciare il dado = it’s your turn to roll the die

The structure is:

• tocca a + person + infinitive

More examples:

• Tocca a me parlare = It’s my turn to speak
• Tocca a voi decidere = It’s your turn to decide

Because toccare a qualcuno is directly followed by the infinitive in this pattern.

So Italian says:

• Tocca a te lanciare il dado

not:

• Tocca a te di lanciare il dado

English learners often expect a preposition before the second verb, but in this case Italian does not use one.

Yes. Lanciare literally means to throw or to toss.

With a die, Italian often uses lanciare il dado, which is the natural equivalent of English to roll the die / toss the die.

So even though English usually says roll the die, Italian commonly says throw/toss the die with lanciare.

Because dado is a masculine singular noun.

• il dado = the die
• i dadi = the dice

So this sentence refers to one die:

• lanciare il dado = to roll the die

If you wanted the plural, you could say:

• lanciare i dadi = to roll the dice

No, Tocca a te il dado lanciare is not correct.

The normal structure is:

• Tocca a te + infinitive + object

So:

• Tocca a te lanciare il dado

That is the natural order. Italian is sometimes flexible with word order, but in this case the infinitive phrase lanciare il dado stays together in the usual order.

Yes. That is also correct and very natural.

Compare:

• Tocca a te lanciare il dado = It’s your turn to roll the die
• È il tuo turno di lanciare il dado = It’s your turn to roll the die

The meaning is basically the same. The first version is a little more idiomatic in the tocca a... pattern, while the second uses the noun turno.

Notice that with turno, Italian usually says:

• È il tuo turno di + infinitive

So here you do get di.

Yes. It changes depending on tense and subject.

In this sentence, tocca is third person singular present because the idea is something like it falls / it is due.

Examples:

• Tocca a te = It’s your turn
• Toccava a me = It was my turn
• Toccherà a noi = It will be our turn

You do not change it to agree with te. The verb stays in the third person because the real subject is an impersonal idea, not you.

It is neutral and natural in everyday Italian.

The te shows that it is addressed to one person informally. If you were speaking formally to one person, you would usually say:

• Tocca a Lei lanciare il dado

And for plural you:

• Tocca a voi lanciare il dado

So the sentence as written is informal singular: you = te.