I could defer you could defer she could defer we could defer you could defer they could defer
V-ing form
I could be deferring you could be deferring she could be deferring we could be deferring you could be deferring they could be deferring
Perfect
I could have deferred you could have deferred she 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 she 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 she 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 she 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 she 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 she 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 she defer? could we defer? could you defer? could they defer?
V-ing form
could I be deferring? could you be deferring? could she be deferring? could we be deferring? could you be deferring? could they be deferring?
Perfect
could I have deferred? could you have deferred? could she 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 she 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 she 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 she 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 she 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 she not have been deferring? could we not have been deferring? could you not have been deferring? could they not have been deferring?