I could mortify you could mortify he could mortify we could mortify you could mortify they could mortify
V-ing form
I could be mortifying you could be mortifying he could be mortifying we could be mortifying you could be mortifying they could be mortifying
Perfect
I could have mortified you could have mortified he could have mortified we could have mortified you could have mortified they could have mortified
V-ing perfect
I could have been mortifying you could have been mortifying he could have been mortifying we could have been mortifying you could have been mortifying they could have been mortifying
Negation
Simple form
I could not mortify you could not mortify he could not mortify we could not mortify you could not mortify they could not mortify
V-ing form
I could not be mortifying you could not be mortifying he could not be mortifying we could not be mortifying you could not be mortifying they could not be mortifying
Perfect
I could not have mortified you could not have mortified he could not have mortified we could not have mortified you could not have mortified they could not have mortified
V-ing perfect
I could not have been mortifying you could not have been mortifying he could not have been mortifying we could not have been mortifying you could not have been mortifying they could not have been mortifying
Interrogative form
Simple form
could I mortify? could you mortify? could he mortify? could we mortify? could you mortify? could they mortify?
V-ing form
could I be mortifying? could you be mortifying? could he be mortifying? could we be mortifying? could you be mortifying? could they be mortifying?
Perfect
could I have mortified? could you have mortified? could he have mortified? could we have mortified? could you have mortified? could they have mortified?
V-ing perfect
could I have been mortifying? could you have been mortifying? could he have been mortifying? could we have been mortifying? could you have been mortifying? could they have been mortifying?
Interro-negative form
Simple form
could I not mortify? could you not mortify? could he not mortify? could we not mortify? could you not mortify? could they not mortify?
V-ing form
could I not be mortifying? could you not be mortifying? could he not be mortifying? could we not be mortifying? could you not be mortifying? could they not be mortifying?
Perfect
could I not have mortified? could you not have mortified? could he not have mortified? could we not have mortified? could you not have mortified? could they not have mortified?
V-ing perfect
could I not have been mortifying? could you not have been mortifying? could he not have been mortifying? could we not have been mortifying? could you not have been mortifying? could they not have been mortifying?