Palabras Confusas en Inglés: 48 Pares Explicados
Incluso los hablantes fluidos confunden estas palabras. Esta guía explica los pares más confusos del inglés con reglas sencillas, trucos de memoria y oraciones de ejemplo auténticas. Usa la búsqueda o filtra por categoría.
48 items · 6 topics
"affect (verb)"
to have an impact on something or someone
"Stress can affect your sleep quality."
"effect (noun)"
the result or outcome of a cause
"The new law had a positive effect on crime rates."
"effect (verb, rare)"
to bring about or cause a change — used formally
"The new manager effected a complete turnaround."
"affect (noun, psychology)"
an emotion or feeling — used in clinical contexts
"The patient displayed flat affect during the session."
"side effect"
an unintended result, usually of a drug or action
"Drowsiness is a common side effect of this medication."
"in effect"
in practice; essentially true
"The rule is, in effect, already being applied."
"take effect"
to begin to work or apply
"The painkillers will take effect within twenty minutes."
"negatively affected"
harmed or worsened by an outside influence
"Millions of people were negatively affected by the drought."
"it's (it is)"
contraction of 'it is' — always replaceable by 'it is'
"It's raining outside again."
"it's (it has)"
contraction of 'it has' — used with perfect tenses
"It's been a long day."
"its (possessive)"
belonging to it — no apostrophe, like 'his' or 'her'
"The company lost its biggest client."
"its own"
belonging exclusively to itself
"Every language has its own rhythm and melody."
"it's worth"
it is worth — a common fixed phrase
"It's worth reading the full report before the meeting."
"its appearance"
how something looks — possessive, no apostrophe
"The building improved its appearance after renovation."
"it's clear"
it is clear — stating an obvious fact
"It's clear that more research is needed."
"at its best"
performing or looking as well as possible
"This is London at its best — warm sun and blue skies."
"there (place)"
in, at, or to that place
"The keys are over there on the table."
"there (existential)"
used to introduce a statement — 'there is / there are'
"There is a problem with the report."
"their (possessive)"
belonging to them
"They left their bags at the hotel."
"they're (they are)"
contraction of 'they are'
"They're arriving on Tuesday morning."
"over there"
at a distance from the speaker
"The post office is over there, past the park."
"their own"
something that belongs individually to them
"Each student submitted their own essay."
"there's no doubt"
there is no doubt — a fixed phrase of certainty
"There's no doubt that exercise improves mood."
"they're going to"
they are going to — expressing future intention
"They're going to announce the results tomorrow."
"lie (recline)"
to rest in a horizontal position — no object needed
"She lies down for a nap every afternoon."
"lay (place)"
to put something down — always needs an object
"Please lay the papers on my desk."
"lay (past of lie)"
past tense of 'lie' — the trickiest confusion point
"He lay on the sofa all evening."
"laid (past of lay)"
past tense of 'lay'
"She laid the book carefully on the shelf."
"lain (past participle of lie)"
used with 'have' — often forgotten
"The documents have lain untouched for months."
"lie low"
to stay hidden or avoid attention
"After the scandal, he decided to lie low for a while."
"lay out"
to arrange or present something in an organised way
"She laid out all the evidence clearly."
"lying down on the job"
not working hard enough — idiom
"You can't accuse her of lying down on the job."
"fewer (countable)"
used with things you can count individually
"There are fewer students in the class this year."
"less (uncountable)"
used with things measured as a mass or quantity
"Try to drink less coffee after noon."
"fewer mistakes"
a smaller number of errors — countable noun
"Advanced learners make fewer mistakes in writing."
"less time"
a smaller amount of time — uncountable noun
"We have less time than I thought."
"no fewer than"
at least — emphasising a large count
"No fewer than fifty applicants were rejected."
"less than ideal"
not good enough; below expectations
"The working conditions were less than ideal."
"fewer and fewer"
a steadily decreasing number
"Fewer and fewer people are buying physical newspapers."
"less and less"
a steadily decreasing amount
"She found herself caring less and less about his opinion."
"who (subject)"
used when the person is the subject doing the action
"Who called you last night?"
"whom (object)"
used when the person receives the action or follows a preposition
"Whom did you call last night?"
"to whom"
formal phrasing before a name or pronoun — common in letters
"To whom it may concern,"
"with whom"
preposition + whom — always use 'whom' after a preposition
"She is the colleague with whom I share an office."
"who is responsible"
subject pronoun — the person doing or owning something
"Who is responsible for this decision?"
"whom to contact"
object pronoun — the person being contacted
"I did not know whom to contact about the complaint."
"whoever vs whomever"
same subject/object rule applies to -ever forms
"Give the award to whoever deserves it most."
"for whom"
for + object pronoun — the person something is intended for
"The prize is for whom it was always intended."
Preguntas frecuentes
¿Cuáles son las palabras más confusas en inglés?
Los pares que más confunden a estudiantes y hablantes nativos incluyen affect/effect, its/it's, there/their/they're, lie/lay, fewer/less y who/whom. Estos son los seis que cubre esta guía. Otros conjuntos frecuentes: then/than, principal/principle y complement/compliment.
¿Cuál es el truco más fácil para 'affect' y 'effect'?
Recuerda RAVEN: Remember Affect is a Verb, Effect is a Noun. Affect (verbo) significa influir en algo; effect (sustantivo) es el resultado. Prueba rápida: si puedes reemplazar la palabra con 'influir', usa affect. Si funciona 'resultado', usa effect.
¿Cómo sé si usar 'fewer' o 'less'?
Pregúntate: ¿puedo contar los objetos individualmente? Si es así, usa fewer (fewer cars, fewer mistakes). Si el sustantivo es una masa o cantidad no contable, usa less (less traffic, less noise). El cartel de supermercado '10 items or less' es técnicamente incorrecto; debería decir '10 items or fewer'.
¿Está desapareciendo 'whom' del inglés moderno?
'Whom' se usa mucho menos en el habla informal y muchos nativos lo evitan en conversación. Sin embargo, sigue siendo correcto y esperado en escritura formal, documentos legales, inglés académico y correos profesionales, especialmente tras preposiciones (to whom, for whom, with whom).
¿Ver videos en inglés me ayudará a dejar de confundir estas palabras?
Sí, significativamente. Escuchar y leer palabras en contexto real es la forma más fiable de desarrollar un instinto para el uso correcto. Cuando encuentras "affect" y "effect" docenas de veces en videos, artículos y podcasts, la elección correcta empieza a sentirse obvia sin necesidad de recordar reglas.
La mejor forma de que el uso correcto se vuelva natural es escuchar estas palabras en contexto real, no solo memorizar reglas.
Practica con videos en inglés →