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Spanish (Spain)

### Adjective + *de* + infinitive

When talking about puzzles and brain teasers, you often want to describe how hard or easy they are to solve. In English, we put the infinitive directly after the adjective (for example, "difficult to solve"). In Spanish, you must link the adjective and the infinitive with the preposition **de**.

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### Adjective agreement

In this structure, the subject of the sentence receives the action of the verb, giving it a passive-like feel. Remember that the adjective must still agree in gender and number with the noun it describes, even though an infinitive follows it.

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### Describing the challenge

Use this pattern to describe complex puzzles alongside adjectives like **intrigante** (intriguing) and **ingenioso** (ingenious).

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Adjectives with infinitives (de + infinitive)

adjective

adverb

conjunction

contraction

determiner

interjection

noun

numeral

preposition

pronoun

sentence

verb

Singular subjects and 'ser' (yo soy, esto es)

Plural nouns and definite articles (los, las)

Plural pronouns and 'ser' (somos, sois, son)

Adjective agreement (-o, -a, -os, -as)

Indefinite articles (un, una, unos, unas)

Simple negation (no)

Yes/no questions

Regular '-ar' verbs (-o, -as, -a...)

Regular '-er' verbs (-o, -es, -e...)

Regular '-ir' verbs (-o, -es, -e...)

Locative adverbs (aquí, allí)

Question words (quién, cómo)

The verb estar (estoy, estás)

The preposition en (en)

Ser vs. estar

The verb tener (tengo, tienes)

Possessive determiners (mi, tu, su)

Origin and possession (de, del)

The verb ir (voy, vas)

Destination (a, al)

The personal 'a' (a)

Stem-changing verbs: e to ie

Stem-changing verbs: o to ue

Irregular first-person verbs

Reflexive verbs (me, te, se)

Numbers 1 to 10 (uno, dos, tres)

Numbers 11 to 20 (once, doce, trece)

Counting by tens to 100 (treinta, cuarenta, cien)

Compound numbers up to 99 (veintiuno, treinta y uno)

Days of the week (el lunes, el martes)

The family and the personal 'a' (a mi tío, a mi prima)

Months of the year

Telling time (es la, son las)

Verbs of liking (me gusta)

Plural agreement with verbs of liking (gustan)

Degree modifiers (muy, mucho)

Formal address (usted, ustedes)

Direct object pronouns (lo, la, los, las)

The near future (ir a)

Obligation (tener que)

Present continuous (-ando, -iendo)

Affirmative commands (tú, vosotros)

Basic Food and Drink

The Human Body: Head and Arms

The Human Body: Legs and Health

Wardrobe Essentials

Fresh Produce

Meals and Proteins

Public Transport

Hello and goodbye (hola, ¿qué tal?)

Thank you, sorry, OK (gracias, vale)

There is, there are (hay)

My building (la escalera, el ascensor)

Describing people (moreno, rubio, tímido)

Land and sea (el mar, el río, el norte)

Sightseeing (la plaza, la catedral)

Asking the way (cerca, a la derecha, todo recto)

In class (¿puedes repetir?)

Verb + infinitive (quiero comer, sé leer)

What's your name? (me llamo, encantado)

Phone, computer and email

Hundreds and thousands (doscientos, mil)

What do you do? (¿a qué te dedicas?)

Personal details (la edad, la fecha de nacimiento)

Me neither (también, tampoco, ni)

How much is it? (el precio, la vuelta)

What's the weather like? (hace sol, nieva)

Free time (el concierto, el tenis)

At the bar (¿qué vas a tomar?)

The Natural World

Demonstratives (este, ese, aquel)

Prepositions of place (encima de, debajo de)

Prepositional pronouns (para mí, contigo)

Ordinal numbers 1st to 10th (primero to décimo)

Adverbs of frequency (a veces, nunca)

Exclamations (¡qué...!)

Indefinite pronouns (algo, alguien)

Indefinite determiners (algún, ningún)

Indirect object pronouns (le, les)

Double object pronouns (me lo, te la)

Double object pronouns (se lo, se la)

Verbs of preference (encantar, interesar)

Impersonal obligation (hay que)

Starting and finishing actions (empezar a, terminar de)

Adjective comparatives (más que, menos que)

Comparatives of equality (tan como)

Noun comparatives (tanto como)

Question	Answer
the riddle (puzzle)	el acertijo
The riddle is very difficult to solve.	El acertijo es muy difícil de resolver.
the trick	el truco
That magic trick is fun to watch, but impossible to do.	Ese truco de magia es divertido de ver, pero imposible de hacer.
the challenge	el reto
This challenge is very complicated to decipher.	Este reto es muy complicado de descifrar.
the guessing riddle	la adivinanza
The girl knows a riddle that is quick to answer.	La niña sabe una adivinanza que es rápida de contestar.
abstract	abstracto
I want to understand this abstract concept.	Quiero entender este concepto abstracto.
to fit	encajar
Can you fit the pieces together? They are impossible to join.	¿Puedes encajar las piezas? Son imposibles de unir.
astute	astuto
The astute woman always knows the trick.	La mujer astuta siempre sabe el truco.
intriguing	intrigante
This abstract puzzle is quite intriguing.	Este rompecabezas abstracto es bastante intrigante.
The labyrinth problem is simple to explain to the others.	El problema del laberinto es sencillo de explicar a los demás.
ingenious	ingenioso
Your brother is very ingenious and loves riddles.	Tu hermano es muy ingenioso y le encantan los acertijos.
challenging	desafiante
Where have you found such a challenging riddle?	¿Dónde has encontrado un acertijo tan desafiante?
My grandfather knows a very intriguing little riddle.	Mi abuelo sabe una adivinanza pequeñita y muy intrigante.
The detective is astute and has an ingenious plan.	El detective es astuto y tiene un plan ingenioso.
It is a challenging level when the last piece does not want to fit.	Es un nivel desafiante cuando la última pieza no quiere encajar.
That intriguing story is difficult to believe.	Esa historia intrigante es difícil de creer.
This game is a very difficult challenge to overcome.	Este juego es un reto muy difícil de superar.
The design of the box is ingenious and difficult to break.	El diseño de la caja es ingenioso y difícil de romper.
We want to solve this puzzle, but the little trick is difficult to see.	Queremos resolver este rompecabezas, pero el truquito es difícil de ver.
Abstract concepts are interesting to study.	Los conceptos abstractos son interesantes de estudiar.
The answer to the riddle is obvious to an astute person.	La respuesta a la adivinanza es obvia para una persona astuta.