Breakdown of Este reto es muy complicado de descifrar.
ser
to be
muy
very
este
this (m.sg., also esta, estos, estas, esto)
complicado
complicated
de
linking word before an infinitive (after 'to have just')
descifrar
to decipher
el reto
the challenge
Questions & Answers about Este reto es muy complicado de descifrar.
Why do we need the preposition de between complicado and descifrar?
This is the core of the passive-like adjective complement you are currently learning. When an adjective describes how a subject experiences an action (like being easy, hard, or complicated to do), Spanish requires the preposition de to link the adjective to the infinitive verb.
How does this structure act like a passive sentence?
In this sentence, este reto is the grammatical subject, but it isn't doing the action of deciphering. Instead, it is receiving the action (it is being deciphered by someone). The structure of an adjective + de + infinitive is a natural way to express this passive idea without using the formal passive voice.
Could I use está instead of es here?
Using es states a general, inherent characteristic of the challenge: its nature is intrinsically complicated. If you used está, it would imply a temporary state or a result of a change, suggesting the challenge is acting unexpectedly complicated right now. For a puzzle's baseline difficulty, ser is the best choice.
What is the difference between reto and desafío?
Both translate to challenge and are often interchangeable. Reto is very common for everyday goals, puzzles, or personal obstacles. Desafío can sound a bit more intense, often implying a direct provocation, a major defiance, or a large-scale societal challenge.
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