2.2. Modals 3: You can't have done (modals in the past)

Actividad
Ya va quedando menos. En la sección anterior vimos los modales en el presente, pero igual que en español, también se pueden utilizar en pasado.
Perfect Modals
Ellos se refieren a las acciones que pasaron o pudieron pasar en el pasado. Veamos un ejemplo del texto sobre grafeno:
Frank Koppens thinks he might have found a way. (Frank Koppens cree que podría haber encontrado una manera.)
Forma: MODAL + HAVE + verbo en participio
Modals |
Ejemplos |
Must have + participio |
Rob has arrived late. He must have been in a traffic jam. |
Should/ought to + have + participio |
You should/ought to have warned me. |
Needn't have + participio |
You needn't have brought anything to my party. |
Would have + participio |
I would have gone to the party, but I was too busy. |
May/might have + participio |
She may/might have taken the wrong bus. |
Could have + participio |
You could have asked the doctor before taking the medicine. |
Can't/ Couldn't have + participio |
He couldn't have gone to the concert because he was doing the test. |
Si no te ha quedado claro, aquí encontrarás otra explicación

Objetivos
Para practicar, algunos ejercicios sobre modales en el pasado.
Ejercicio 1 | Ejercicio 2 | Ejercicio 3 |