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