How to Say "it's necessary" in Spanish
The Spanish word for “it's necessary” is “toca” — B1 level. This is a very common word in everyday Spanish.
Examples
Me toca pagar la cena esta noche.
It's my turn to pay for dinner tonight. (Literally: It touches me to pay)
A él no le toca decidir eso.
It's not up to him to decide that.
Esa canción no toca los temas que me interesan.
That song doesn't deal with the topics that interest me.
The 'Turn' Construction
When used to mean 'whose turn it is,' the sentence structure is similar to 'gustar.' You use an indirect object pronoun (me, te, le) followed by 'toca' to indicate who has the responsibility.
Using 'toca' instead of 'deber'
Mistake: “Using 'Toca estudiar' to mean 'I must study'.”
Correction: While 'toca' implies necessity, it usually implies duty/turn. Use 'debo estudiar' (I must study) for personal obligation.
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