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Verbos Modales en Pasado (Poder), Verbos Modales en Pasado (Deber) -…
Verbos Modales en Pasado
(Poder)
Can + Have + v. p. pas.
Posibilidad
Reevaluations should be thorough, since exposure
to viruses can have taken place.
Can't + Have + v. p. pas.
Deducción
The two systems can't have had the same virus
because the damages were different.
May + Have + V. p. pas.
Posibilidad
The antivirus, however, may have reacted more to
the virus infections than to other apps.
Might + Have + V. p. pas.
Posibilidad
If we had utilized a simple routine method, the outcome might have been adverse to our expectations
Could + Have + V. p. pas.
Critica Por una accion pasada
You could have told me you were buying a new
device.
Posibilidad
There were other devices with much less serious
damages that could have had the same virus.
Verbos Modales en Pasado (Deber)
Must + Have + V. p.pas.
Oblicacióon
The engineer must have changed the device to
protect the system.
Deducción
Engineers must have bought new software a year
before the new hardware approval.
Should + Have + V.p.pas
Crítica/arrepentimiento
por una acción pasada
The new engineer should have purchased a new device even though the conclusive diagnoses had not yet been made.
Acciones que se esperaba que ocurrieran, pero no ocurrieron
The notebook should have started by now
Ought to + Have + V. p. pas.
Crítica/arrepentimiento
por una acción pasada
The client ought to have waited longer for the PC to
be ready
Anhelo por algo que no ocurrio
The results ought to have arrived by now