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