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