El vaciado necesita un molde.

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Breakdown of El vaciado necesita un molde.

• necesitar: to need
• el molde: the mould
• el vaciado: the casting process

Questions & Answers about El vaciado necesita un molde.

Why is there an article in el vaciado?

Because vaciado is being used here as a noun, not as a verb.

In Spanish, it is very common to turn a participle or verb-related form into a noun by putting an article in front of it. So el vaciado means something like the emptying / the casting / the hollowing-out / the poured piece, depending on context.

Without the article, vaciado would more naturally be read as a participle or adjective in other kinds of sentences.

Why is it necesita and not necesitan?

Because the subject is el vaciado, which is singular.

• el vaciado = singular
• so the verb must be third-person singular: necesita

If the subject were plural, you would use necesitan:

• Los vaciados necesitan un molde.

What form of the verb is necesita?

It is the present indicative, third-person singular, of necesitar.

The full present tense is:

• yo necesito
• tú necesitas
• él/ella/usted necesita
• nosotros/nosotras necesitamos
• vosotros/vosotras necesitáis
• ellos/ellas/ustedes necesitan

So in this sentence, el vaciado necesita = the vaciado needs.