Past Modals of Deduction > B2 level
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. He _______________ the red light.(see)
may not/mightnot/can't have seen
Roger ate seven slices of pizza. He _______________ very hungry. (be)
must have been