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