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