I could mortgage you could mortgage she could mortgage we could mortgage you could mortgage they could mortgage
V-ing form
I could be mortgaging you could be mortgaging she could be mortgaging we could be mortgaging you could be mortgaging they could be mortgaging
Perfect
I could have mortgaged you could have mortgaged she could have mortgaged we could have mortgaged you could have mortgaged they could have mortgaged
V-ing perfect
I could have been mortgaging you could have been mortgaging she could have been mortgaging we could have been mortgaging you could have been mortgaging they could have been mortgaging
Negation
Simple form
I couldn't mortgage you couldn't mortgage she couldn't mortgage we couldn't mortgage you couldn't mortgage they couldn't mortgage
V-ing form
I couldn't be mortgaging you couldn't be mortgaging she couldn't be mortgaging we couldn't be mortgaging you couldn't be mortgaging they couldn't be mortgaging
Perfect
I couldn't have mortgaged you couldn't have mortgaged she couldn't have mortgaged we couldn't have mortgaged you couldn't have mortgaged they couldn't have mortgaged
V-ing perfect
I couldn't have been mortgaging you couldn't have been mortgaging she couldn't have been mortgaging we couldn't have been mortgaging you couldn't have been mortgaging they couldn't have been mortgaging
Interrogative form
Simple form
could I mortgage? could you mortgage? could she mortgage? could we mortgage? could you mortgage? could they mortgage?
V-ing form
could I be mortgaging? could you be mortgaging? could she be mortgaging? could we be mortgaging? could you be mortgaging? could they be mortgaging?
Perfect
could I have mortgaged? could you have mortgaged? could she have mortgaged? could we have mortgaged? could you have mortgaged? could they have mortgaged?
V-ing perfect
could I have been mortgaging? could you have been mortgaging? could she have been mortgaging? could we have been mortgaging? could you have been mortgaging? could they have been mortgaging?
Interro-negative form
Simple form
couldn't I mortgage? couldn't you mortgage? couldn't she mortgage? couldn't we mortgage? couldn't you mortgage? couldn't they mortgage?
V-ing form
couldn't I be mortgaging? couldn't you be mortgaging? couldn't she be mortgaging? couldn't we be mortgaging? couldn't you be mortgaging? couldn't they be mortgaging?
Perfect
couldn't I have mortgaged? couldn't you have mortgaged? couldn't she have mortgaged? couldn't we have mortgaged? couldn't you have mortgaged? couldn't they have mortgaged?
V-ing perfect
couldn't I have been mortgaging? couldn't you have been mortgaging? couldn't she have been mortgaging? couldn't we have been mortgaging? couldn't you have been mortgaging? couldn't they have been mortgaging?