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