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