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