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