Modals are like volume knobs. They adjust the intensity of reality, obligation, and ability.
Los modales son como perillas de volumen. Ajustan la intensidad de la realidad, la obligación y la habilidad.
Repasa la teoría fundamental y practica con ejercicios directos de modales.
01
MODALS IN DEPTH
A. Modales de Presente y sus Matices
💪 1. Ability & Skill (Habilidad)
CAN (Present)
"I can analyze financial trends."
(Habilidad general o puntual en el presente)
COULD (Past)
"She could speak five languages when she was 20."
(Habilidad general en el pasado)
BE ABLE TO (All tenses)
"I haven't been able to find the payslip yet."
Tip: Úsalo para tiempos que Can no tiene (Future, Present Perfect, Gerunds).
🔑 2. Permission & Requests (Permiso y Peticiones)
CAN
"Can I use the photocopier?"
(Informal)
COULD
"Could you help me with this task?"
(Formal/Polite)
MAY
"May I come in, sir?"
(Very formal)
⚖️ 3. Obligation & Necessity (Obligación y Necesidad)
MUST (Internal)
"I must call the manager today."
(Sientes que es tu deber personal)
HAVE TO (External)
"We have to clock in before 9:00."
(Obligación impuesta por normas o leyes)
NEED TO (Practical Necessity)
"You need to update your CV if you want a promotion."
📢 4. Advice & Suggestion (Consejo y Sugerencia)
SHOULD / OUGHT TO
"You should prepare for the interview."
Ought to es más formal pero idéntico en significado.
SHALL (Suggestions/Offers)
"Shall I carry those folders for you?"
Usado en 1ª persona (I/We) para ofrecimientos.
🚫 5. Prohibition & Lack of Necessity
MUSTN'T (Prohibited)
"You mustn't share your passwords."
ESTÁ TOTALMENTE PROHIBIDO
DON'T HAVE TO / NEEDN'T (Optional)
"You needn't come on Saturday."
NO ES NECESARIO (SI QUIERES, VIENES)
🔮 6. Probability & Possibility
MAY
"It may rain today."
(50% Prob.)
MIGHT
"We might win."
(Remote Prob.)
COULD
"It could be true."
(Theoretical)
🧐 7. Logical Deduction (Presente)
MUST (100% Sure +)
"The lights are on. He must be at work."
CAN'T (100% Sure -)
"He is in Tokyo. He can't be at work today."
🚀 8. Future Intentions & Predictions (Will)
WILL (Decision/Promise)
"I will send you the final draft by noon."
Decisión instantánea o promesa formal.
WILL (Prediction)
"Experts believe AI will transform every industry."
Predicciones basadas en lo que creemos.
🚨 RED FLAG: Common Errors
Error: He can to speak English. ➔ Correct: He can speak English.
Error: I didn't must go. ➔ Correct: I didn't have to go.
Error: She musts work. ➔ Correct: She must work. (No se añade 's' en 3ª pers).
B. Had Better Masterclass: Warnings
Se usa para consejos con una **consecuencia negativa** real. Had Better + Infinitive (no 'to').
➕ Affirmative Examples:
"You 'd better check the AI report before the meeting."
"We had better invest in upskilling training this year."
"You had better research the company or you won't get the job."
➖ Negative Examples:
"You had better not share your access keys."
"Employees had better not ignore safety regulations."
"You 'd better not miss the deadline for the application."
02
MODAL PERFECTS
Estructuras Clave (Equivalencias Lógicas)
Estructura
Equivalencia / Significado
Uso en EBAU
Must have + PP
Deducir positivamente (It is certain that...)
Certeza sobre el pasado.
Can't have + PP
Deducir negativamente (I am sure it didn't...)
Incredulidad sobre el pasado.
Should have + PP
Consejo no realizado (It was a good idea, but...)
Lamento o reproche.
Might / May have + PP
Posibilidad pasada (Perhaps... / Maybe...)
Incertidumbre.
Needn't have + PP
Acción hecha innecesariamente (...but I did it)
Acción sobrante.
✏️ REPHRASING CHALLENGE
Reescribe las frases sin cambiar el significado original.
1. It was a mistake for you to shout at her.
➔ You (should)
2. I'm sure she didn't take your keys. She was with me.
➔ She (can't)
3. Perhaps he forgot about the meeting.
➔ He (might)
4. It's certain that they missed the train.
➔ They (must)
5. I bought a lot of food, but it wasn't necessary.
➔ I (needn't)
6. It was wrong of them not to tell us the truth.
➔ They (ought)
Soluciones y Explicación Lógica
1. You shouldn't have shouted at her. Explicación: "It was a mistake" → Reproche negativo. Como fue un error hacerlo, usamos shouldn't have + participio.
2. She can't have taken your keys. Explicación: "I'm sure... didn't" = Deducción negativa basada en pruebas. Usamos can't have + PP.
3. He might have forgotten the meeting. Explicación: "Perhaps/Maybe" = Posibilidad. Se usa might have + PP.
4. They must have missed the train. Explicación: "It's certain... did" = Certeza de que algo ocurrió. Usamos must have + PP.
5. I needn't have bought so much food. Explicación: Acción ya realizada que resultó ser innecesaria. Usamos needn't have + PP.
6. They ought to have told us the truth. Explicación: "It was wrong not to" = Debería haberse hecho. Usamos ought to have + PP.
Consejos para Selectividad:
Fíjate en si la frase original es afirmativa o negativa.
"It was a pity/mistake" suele transformarse con should have.
Wh-: "Where do you work?" ➔ He asked me where I worked.
Yes/No: "Do you like coding?" ➔ She asked if I liked coding.
Orders & Requests (To / Not to)
"Sign the contract!" ➔ He told me to sign the contract.
C. Advanced Reporting Verbs
Verb + -ING
"He suggested working from home."
Verb + To-Inf
"She offered to help."
Verb + Obj + To
"They warned me not to quit."
04
FINAL REVISION CHALLENGE
Part 1: Reported Speech (Estilo Indirecto)
Rewrite the following sentences starting with the words given.
1. "I bought this car yesterday," he said.
➔ He said that...
2. "Where are you going to spend your holidays?" she asked me.
➔ She asked me...
3. "Did you finish the report on time?" the boss asked him.
➔ The boss wanted to know...
4. "Don't open the window, please!" the teacher told the students.
➔ The teacher ordered the students...
5. "Let's go to the cinema tonight," Peter said.
➔ Peter suggested...
He had bought that car the day before / the previous day.
where I was going to spend my holidays.
if / whether he had finished the report on time.
not to open the window.
going to the cinema that night.
Part 2: Modal Verbs & Perfect Modals
Rewrite the following sentences using a suitable modal or perfect modal verb.
1. I am absolutely sure he is British; he has a strong accent.
➔ He...
2. I am sure they didn't steal the money; they were with me.
➔ They...
3. It was a terrible mistake to lie to your parents.
➔ You...
4. It isn't necessary for you to bring a towel to the gym.
➔ You...
5. Smoking is strictly forbidden in this area.
➔ You...
He must be British.
They can't have stolen the money.
You shouldn't have lied to your parents.
You don't have to / needn't / don't need to bring a towel.
You mustn't / can't smoke in this area.
✅ Feedback para el Éxito
Aprovecha estas soluciones para entender por qué se hace cada cambio. En Selectividad, un pequeño error en un pronombre o en una expresión de tiempo suele invalidar la respuesta entera. ¡Revisa con ojo crítico!
