I could defer you could defer he could defer we could defer you could defer they could defer
V-ing form
I could be deferring you could be deferring he could be deferring we could be deferring you could be deferring they could be deferring
Perfect
I could have deferred you could have deferred he could have deferred we could have deferred you could have deferred they could have deferred
V-ing perfect
I could have been deferring you could have been deferring he could have been deferring we could have been deferring you could have been deferring they could have been deferring
Negation
Simple form
I could not defer you could not defer he could not defer we could not defer you could not defer they could not defer
V-ing form
I could not be deferring you could not be deferring he could not be deferring we could not be deferring you could not be deferring they could not be deferring
Perfect
I could not have deferred you could not have deferred he could not have deferred we could not have deferred you could not have deferred they could not have deferred
V-ing perfect
I could not have been deferring you could not have been deferring he could not have been deferring we could not have been deferring you could not have been deferring they could not have been deferring
Interrogative form
Simple form
could I defer? could you defer? could he defer? could we defer? could you defer? could they defer?
V-ing form
could I be deferring? could you be deferring? could he be deferring? could we be deferring? could you be deferring? could they be deferring?
Perfect
could I have deferred? could you have deferred? could he have deferred? could we have deferred? could you have deferred? could they have deferred?
V-ing perfect
could I have been deferring? could you have been deferring? could he have been deferring? could we have been deferring? could you have been deferring? could they have been deferring?
Interro-negative form
Simple form
could I not defer? could you not defer? could he not defer? could we not defer? could you not defer? could they not defer?
V-ing form
could I not be deferring? could you not be deferring? could he not be deferring? could we not be deferring? could you not be deferring? could they not be deferring?
Perfect
could I not have deferred? could you not have deferred? could he not have deferred? could we not have deferred? could you not have deferred? could they not have deferred?
V-ing perfect
could I not have been deferring? could you not have been deferring? could he not have been deferring? could we not have been deferring? could you not have been deferring? could they not have been deferring?