Question 1

Why do we use the plural ci vogliono instead of ci vuole?

Accepted Answer

The verb volerci (meaning "to take" time or effort) must match the quantity of the thing that is needed. Because trenta minuti is plural, the verb acts like "they take" and uses the plural form vogliono. If the delay was just one minute, you would use the singular: ci vuole un minuto.

Question 2

Since we are also learning metterci, could I use it here instead?

Accepted Answer

You could, but it changes the meaning! Volerci is impersonal: ci vogliono trenta minuti just states a general fact ("it takes thirty minutes"). Metterci is personal and focuses on who is taking the time. If you said ci mettiamo trenta minuti, it would mean "we take thirty minutes" to get through the intersection.

Question 3

Volere means "to want". Why is it used here to mean "it takes"?

Accepted Answer

By adding the little word ci to volere, Italian creates a "pronominal verb" (volerci) with a brand new meaning: "to be needed" or "to take" (referring to time, money, or effort). A helpful trick is to think of ci vogliono trenta minuti as literally meaning "thirty minutes are wanted/needed here".

Question 4

Why does bloccato end in -o? Can it change?

Accepted Answer

Yes, it can change. In this sentence, the past participle bloccato is acting as an adjective describing the noun l'incrocio (the intersection). Because incrocio is a masculine singular noun, bloccato must end in -o. If you were talking about a road (la strada, which is feminine), it would change to match: la strada è bloccata.

L'incrocio è bloccato, ci vogliono trenta minuti.

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