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