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