I could dignify you could dignify he could dignify we could dignify you could dignify they could dignify
V-ing form
I could be dignifying you could be dignifying he could be dignifying we could be dignifying you could be dignifying they could be dignifying
Perfect
I could have dignified you could have dignified he could have dignified we could have dignified you could have dignified they could have dignified
V-ing perfect
I could have been dignifying you could have been dignifying he could have been dignifying we could have been dignifying you could have been dignifying they could have been dignifying
Negation
Simple form
I couldn't dignify you couldn't dignify he couldn't dignify we couldn't dignify you couldn't dignify they couldn't dignify
V-ing form
I couldn't be dignifying you couldn't be dignifying he couldn't be dignifying we couldn't be dignifying you couldn't be dignifying they couldn't be dignifying
Perfect
I couldn't have dignified you couldn't have dignified he couldn't have dignified we couldn't have dignified you couldn't have dignified they couldn't have dignified
V-ing perfect
I couldn't have been dignifying you couldn't have been dignifying he couldn't have been dignifying we couldn't have been dignifying you couldn't have been dignifying they couldn't have been dignifying
Interrogative form
Simple form
could I dignify? could you dignify? could he dignify? could we dignify? could you dignify? could they dignify?
V-ing form
could I be dignifying? could you be dignifying? could he be dignifying? could we be dignifying? could you be dignifying? could they be dignifying?
Perfect
could I have dignified? could you have dignified? could he have dignified? could we have dignified? could you have dignified? could they have dignified?
V-ing perfect
could I have been dignifying? could you have been dignifying? could he have been dignifying? could we have been dignifying? could you have been dignifying? could they have been dignifying?
Interro-negative form
Simple form
couldn't I dignify? couldn't you dignify? couldn't he dignify? couldn't we dignify? couldn't you dignify? couldn't they dignify?
V-ing form
couldn't I be dignifying? couldn't you be dignifying? couldn't he be dignifying? couldn't we be dignifying? couldn't you be dignifying? couldn't they be dignifying?
Perfect
couldn't I have dignified? couldn't you have dignified? couldn't he have dignified? couldn't we have dignified? couldn't you have dignified? couldn't they have dignified?
V-ing perfect
couldn't I have been dignifying? couldn't you have been dignifying? couldn't he have been dignifying? couldn't we have been dignifying? couldn't you have been dignifying? couldn't they have been dignifying?