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