Verbs of Necessity and Lack
In Italian, verbs expressing need, lack, or sufficiency—like servire (to need / be useful), mancare (to lack / be missing), and bastare (to be enough)—use an inverse structure.
Just like with piacere, the item that is needed, lacking, or sufficient acts as the grammatical subject. The verb conjugates to match this item (usually in the third-person singular or plural).
Specifying Who Needs or Lacks It
To express who needs or lacks the item, use an indirect object pronoun (like ci for "us", or formal Le for "you"). Think of the literal translation as "The component is useful to us" or "The forklift is enough for you."
To express a quantity of the item (like "five of them"), add the partitive pronoun ne. When combined with ci, the pronoun cluster becomes ce ne.
Managing Logistics and Shortages
When managing inventory and supply chains, mancare and servire are frequently used to identify missing items and requirements.
To simply state that a resource is running low in general, use the standard (non-inverse) verb scarseggiare (to run low / be scarce).