I could knight you could knight he could knight we could knight you could knight they could knight
V-ing form
I could be knighting you could be knighting he could be knighting we could be knighting you could be knighting they could be knighting
Perfect
I could have knighted you could have knighted he could have knighted we could have knighted you could have knighted they could have knighted
V-ing perfect
I could have been knighting you could have been knighting he could have been knighting we could have been knighting you could have been knighting they could have been knighting
Negation
Simple form
I could not knight you could not knight he could not knight we could not knight you could not knight they could not knight
V-ing form
I could not be knighting you could not be knighting he could not be knighting we could not be knighting you could not be knighting they could not be knighting
Perfect
I could not have knighted you could not have knighted he could not have knighted we could not have knighted you could not have knighted they could not have knighted
V-ing perfect
I could not have been knighting you could not have been knighting he could not have been knighting we could not have been knighting you could not have been knighting they could not have been knighting
Interrogative form
Simple form
could I knight? could you knight? could he knight? could we knight? could you knight? could they knight?
V-ing form
could I be knighting? could you be knighting? could he be knighting? could we be knighting? could you be knighting? could they be knighting?
Perfect
could I have knighted? could you have knighted? could he have knighted? could we have knighted? could you have knighted? could they have knighted?
V-ing perfect
could I have been knighting? could you have been knighting? could he have been knighting? could we have been knighting? could you have been knighting? could they have been knighting?
Interro-negative form
Simple form
could I not knight? could you not knight? could he not knight? could we not knight? could you not knight? could they not knight?
V-ing form
could I not be knighting? could you not be knighting? could he not be knighting? could we not be knighting? could you not be knighting? could they not be knighting?
Perfect
could I not have knighted? could you not have knighted? could he not have knighted? could we not have knighted? could you not have knighted? could they not have knighted?
V-ing perfect
could I not have been knighting? could you not have been knighting? could he not have been knighting? could we not have been knighting? could you not have been knighting? could they not have been knighting?