I could lazy you could lazy she could lazy we could lazy you could lazy they could lazy
V-ing form
I could be lazying you could be lazying she could be lazying we could be lazying you could be lazying they could be lazying
Perfect
I could have lazied you could have lazied she could have lazied we could have lazied you could have lazied they could have lazied
V-ing perfect
I could have been lazying you could have been lazying she could have been lazying we could have been lazying you could have been lazying they could have been lazying
Negation
Simple form
I could not lazy you could not lazy she could not lazy we could not lazy you could not lazy they could not lazy
V-ing form
I could not be lazying you could not be lazying she could not be lazying we could not be lazying you could not be lazying they could not be lazying
Perfect
I could not have lazied you could not have lazied she could not have lazied we could not have lazied you could not have lazied they could not have lazied
V-ing perfect
I could not have been lazying you could not have been lazying she could not have been lazying we could not have been lazying you could not have been lazying they could not have been lazying
Interrogative form
Simple form
could I lazy? could you lazy? could she lazy? could we lazy? could you lazy? could they lazy?
V-ing form
could I be lazying? could you be lazying? could she be lazying? could we be lazying? could you be lazying? could they be lazying?
Perfect
could I have lazied? could you have lazied? could she have lazied? could we have lazied? could you have lazied? could they have lazied?
V-ing perfect
could I have been lazying? could you have been lazying? could she have been lazying? could we have been lazying? could you have been lazying? could they have been lazying?
Interro-negative form
Simple form
could I not lazy? could you not lazy? could she not lazy? could we not lazy? could you not lazy? could they not lazy?
V-ing form
could I not be lazying? could you not be lazying? could she not be lazying? could we not be lazying? could you not be lazying? could they not be lazying?
Perfect
could I not have lazied? could you not have lazied? could she not have lazied? could we not have lazied? could you not have lazied? could they not have lazied?
V-ing perfect
could I not have been lazying? could you not have been lazying? could she not have been lazying? could we not have been lazying? could you not have been lazying? could they not have been lazying?