I could stupefy you could stupefy she could stupefy we could stupefy you could stupefy they could stupefy
V-ing form
I could be stupefying you could be stupefying she could be stupefying we could be stupefying you could be stupefying they could be stupefying
Perfect
I could have stupefied you could have stupefied she could have stupefied we could have stupefied you could have stupefied they could have stupefied
V-ing perfect
I could have been stupefying you could have been stupefying she could have been stupefying we could have been stupefying you could have been stupefying they could have been stupefying
Negation
Simple form
I could not stupefy you could not stupefy she could not stupefy we could not stupefy you could not stupefy they could not stupefy
V-ing form
I could not be stupefying you could not be stupefying she could not be stupefying we could not be stupefying you could not be stupefying they could not be stupefying
Perfect
I could not have stupefied you could not have stupefied she could not have stupefied we could not have stupefied you could not have stupefied they could not have stupefied
V-ing perfect
I could not have been stupefying you could not have been stupefying she could not have been stupefying we could not have been stupefying you could not have been stupefying they could not have been stupefying
Interrogative form
Simple form
could I stupefy? could you stupefy? could she stupefy? could we stupefy? could you stupefy? could they stupefy?
V-ing form
could I be stupefying? could you be stupefying? could she be stupefying? could we be stupefying? could you be stupefying? could they be stupefying?
Perfect
could I have stupefied? could you have stupefied? could she have stupefied? could we have stupefied? could you have stupefied? could they have stupefied?
V-ing perfect
could I have been stupefying? could you have been stupefying? could she have been stupefying? could we have been stupefying? could you have been stupefying? could they have been stupefying?
Interro-negative form
Simple form
could I not stupefy? could you not stupefy? could she not stupefy? could we not stupefy? could you not stupefy? could they not stupefy?
V-ing form
could I not be stupefying? could you not be stupefying? could she not be stupefying? could we not be stupefying? could you not be stupefying? could they not be stupefying?
Perfect
could I not have stupefied? could you not have stupefied? could she not have stupefied? could we not have stupefied? could you not have stupefied? could they not have stupefied?
V-ing perfect
could I not have been stupefying? could you not have been stupefying? could she not have been stupefying? could we not have been stupefying? could you not have been stupefying? could they not have been stupefying?