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