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