I could amaze you could amaze she could amaze we could amaze you could amaze they could amaze
V-ing form
I could be amazing you could be amazing she could be amazing we could be amazing you could be amazing they could be amazing
Perfect
I could have amazed you could have amazed she could have amazed we could have amazed you could have amazed they could have amazed
V-ing perfect
I could have been amazing you could have been amazing she could have been amazing we could have been amazing you could have been amazing they could have been amazing
Negation
Simple form
I couldn't amaze you couldn't amaze she couldn't amaze we couldn't amaze you couldn't amaze they couldn't amaze
V-ing form
I couldn't be amazing you couldn't be amazing she couldn't be amazing we couldn't be amazing you couldn't be amazing they couldn't be amazing
Perfect
I couldn't have amazed you couldn't have amazed she couldn't have amazed we couldn't have amazed you couldn't have amazed they couldn't have amazed
V-ing perfect
I couldn't have been amazing you couldn't have been amazing she couldn't have been amazing we couldn't have been amazing you couldn't have been amazing they couldn't have been amazing
Interrogative form
Simple form
could I amaze? could you amaze? could she amaze? could we amaze? could you amaze? could they amaze?
V-ing form
could I be amazing? could you be amazing? could she be amazing? could we be amazing? could you be amazing? could they be amazing?
Perfect
could I have amazed? could you have amazed? could she have amazed? could we have amazed? could you have amazed? could they have amazed?
V-ing perfect
could I have been amazing? could you have been amazing? could she have been amazing? could we have been amazing? could you have been amazing? could they have been amazing?
Interro-negative form
Simple form
couldn't I amaze? couldn't you amaze? couldn't she amaze? couldn't we amaze? couldn't you amaze? couldn't they amaze?
V-ing form
couldn't I be amazing? couldn't you be amazing? couldn't she be amazing? couldn't we be amazing? couldn't you be amazing? couldn't they be amazing?
Perfect
couldn't I have amazed? couldn't you have amazed? couldn't she have amazed? couldn't we have amazed? couldn't you have amazed? couldn't they have amazed?
V-ing perfect
couldn't I have been amazing? couldn't you have been amazing? couldn't she have been amazing? couldn't we have been amazing? couldn't you have been amazing? couldn't they have been amazing?