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