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