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