I don’t know why Margarita didn’t come to the party: she ____________ busy (be)
might/may/could have been
The driver didn’t stop because he _______________ the red light.(see)
may/might not have seen
Roger ate seven slices of pizza. He _______________ very hungry. (be)
must have been
Oliver was in the classroom five minutes ago: he _______________ home already. (arrive)
can't have arrived
Marvin missed the bus this morning: he can’t / must have arrived on time at work
can't
Someone’s left their mobile here: it could / can’t have been Diana or Josseling
Could
This is not Bolivar Avenue: we can’t / must have taken the wrong road.
must
It’s eight o’clock and Harvyn is in bed already: He can’t / must have been very tired.
must
The thief ______________________ in through the window. It's not broken or forced (get)
can't have
Chepito is very clever: he must / might have passed all his exams with top marks.
must
