THE LOGIC OF…
CAUSATIVE CLAUSES
Understand it. Use it. Remember it.
NeuroEnglish for You! · 25 interactive missions
THE LOGIC OF…
Understand it. Use it. Remember it.
NeuroEnglish for You! · 25 interactive missions
Small-town roots. Global ambition.
Your industrial future starts with an idea.
ELA Aviación · Fuente Obejuna · Alto Guadiato · Córdoba

Read reality. Predict the future. Imagine alternatives. Rewrite the past. Master the logic behind every English conditional.
Header image: Crawick Multiverse · Mainlymazza · CC BY-SA 4.0.
Unidad Didáctica Integral: Modal Verbs, Modal Perfects y Reported Speech.
Presente, deducción, prohibición y el uso crítico de Had Better en el entorno laboral.
Dominio de los Modal Perfects: equivalencias lógicas y rephrasing de nivel EBAU.
Reported Speech: transformaciones temporales y verbos de reporte avanzados.
| Verb | Type | Function | Work Example |
|---|---|---|---|
| Can | Modal | Ability / Permission | I can manage datasets. |
| Could | Modal | Past Ability / Request | Could you help me? |
| Will | Modal | Future / Intentions | I will lead the project. |
| May / Might | Modal | Probability | AI might change our tasks. |
| Must | Modal | Obligation / Deduction | You must sign the NDA. |
| Should | Modal | Advice | You should ask for a raise. |
| Would | Modal | Hypothetical | I would like to join. |
| Have to | Semi-Modal | External Obligation | I have to work in shifts. |
| Ought to | Semi-Modal | Moral Advice | We ought to be inclusive. |
| Had better | Semi-Modal | Strong Warning | You 'd better not be late! |
| Need to | Semi-Modal | Necessity | You need to update your CV. |
Repasa la teoría fundamental y practica con ejercicios directos de modales.
"I can analyze financial trends."
(Habilidad general o puntual en el presente)
"She could speak five languages when she was 20."
(Habilidad general en el pasado)
"I haven't been able to find the payslip yet."
Tip: Úsalo para tiempos que Can no tiene (Future, Present Perfect, Gerunds).
"Can I use the photocopier?"
(Informal)
"Could you help me with this task?"
(Formal/Polite)
"May I come in, sir?"
(Very formal)
"I must call the manager today."
(Sientes que es tu deber personal)
"We have to clock in before 9:00."
(Obligación impuesta por normas o leyes)
"You need to update your CV if you want a promotion."
"You should prepare for the interview."
Ought to es más formal pero idéntico en significado.
"Shall I carry those folders for you?"
Usado en 1ª persona (I/We) para ofrecimientos.
"You mustn't share your passwords."
ESTÁ TOTALMENTE PROHIBIDO
"You needn't come on Saturday."
NO ES NECESARIO (SI QUIERES, VIENES)
"It may rain today."
(50% Prob.)
"We might win."
(Remote Prob.)
"It could be true."
(Theoretical)
"The lights are on. He must be at work."
"He is in Tokyo. He can't be at work today."
"I will send you the final draft by noon."
Decisión instantánea o promesa formal.
"Experts believe AI will transform every industry."
Predicciones basadas en lo que creemos.
Se usa para consejos con una **consecuencia negativa** real. Had Better + Infinitive (no 'to').
| 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. |
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)
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.
Wh-: "Where do you work?" ➔ He asked me where I worked.
Yes/No: "Do you like coding?" ➔ She asked if I liked coding.
"Sign the contract!" ➔ He told me to sign the contract.
"He suggested working from home."
"She offered to help."
"They warned me not to quit."
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...
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...
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!
@NeuroEnglishMMP Presents
Analiza el glosario. Al pre-activar términos como "microplastics" o "landfills", facilitas que tu cerebro cree un mapa mental antes de oír el audio.
Presta atención a las cifras y fechas (2050). Son puntos de anclaje que el cerebro utiliza para situar la gravedad del problema.
Usa el transcript interactivo. Pasar el ratón por las palabras clave ayuda a que tu cerebro vincule la fonética con el significado visual.
The buildup of something over time.
Acumulación
Extremely small pieces of plastic debris.
Microplásticos
Places where waste is buried.
Vertederos
System designed to reuse and repair.
Economía circular
Changing from one state to another.
Transición / Cambio
Able to be maintained over time.
Sostenible
Este sistema usa las voces instaladas en tu dispositivo (Priorizando voces de UK).
"The accumulation of plastic waste has evolved into one of the most critical environmental challenges of the 21st century. Every year, global industries produce millions of tons of single-use plastics—such as straws, water bottles, and grocery bags—which often end up in our oceans. This pollution does not only spoil the beauty of our beaches; it creates a deadly trap for marine life. Small animals often mistake 'microplastics' for food, which allows toxic chemicals to enter the human food chain through the fish we eat. Scientists warn that if we do not change our habits, there could be more plastic than fish in the sea by the year 2050.
While recycling is frequently presented as the main solution, experts argue that it is not enough on its own. Many types of plastic are extremely difficult or expensive to process, and a large percentage of what we put in recycling bins still ends up in landfills. Consequently, the real solution lies in transitioning to a circular economy. In this model, products are designed from the beginning to be reused, repaired, or composted rather than thrown away after a single use. This shift requires both government regulations to ban certain plastics and a conscious effort from consumers to choose sustainable alternatives. Reducing our daily consumption and supporting innovative packaging is essential to protect the planet’s biodiversity for future generations."
💡 Tip: ¡Pasa el ratón por las palabras subrayadas para obtener ayuda!