Question 1

Why is agitare in the infinitive here instead of a regular imperative command form?

Accepted Answer

This is the jussive infinitive (infinito iussivo). In Italian, the infinitive is used to give general instructions, rules, or warnings to a broad audience rather than a specific person. You will see this all the time on product labels, in recipes, and on public signs.

Question 2

Wait, doesn't the informal negative command for "tu" also use non + infinitive? How is this different?

Accepted Answer

Yes, the negative tu imperative is identically formed with non + infinitive. However, in the context of a general warning like a product label, it functions as an impersonal command to anyone reading it. You can tell it is the jussive infinitive because an affirmative general instruction would also use the infinitive (like agitare bene - "shake well"), whereas an affirmative tu command would switch to the imperative mood (agita bene).

Question 3

Does the phrase visto che require the subjunctive mood?

Accepted Answer

No, it takes the indicative mood (here, contiene). Visto che means "since," "seeing as," or "given that." It is used to state an objective fact or an already established reason, which is why the indicative is the right choice.

Question 4

How would you make the word gas plural in Italian?

Accepted Answer

It stays exactly the same: i gas. Foreign loanwords ending in a consonant are generally invariable in Italian, meaning their spelling does not change in the plural. You simply change the article to reflect the number.

Visto che contiene gas, non agitare il liquido.

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