I can gainsay you can gainsay he can gainsay we can gainsay you can gainsay they can gainsay
V-ing form
I can be gainsaying you can be gainsaying he can be gainsaying we can be gainsaying you can be gainsaying they can be gainsaying
Perfect
I can have gainsaid you can have gainsaid he can have gainsaid we can have gainsaid you can have gainsaid they can have gainsaid
V-ing perfect
I can have been gainsaying you can have been gainsaying he can have been gainsaying we can have been gainsaying you can have been gainsaying they can have been gainsaying
Negation
Simple form
I can't gainsay you can't gainsay he can't gainsay we can't gainsay you can't gainsay they can't gainsay
V-ing form
I can't be gainsaying you can't be gainsaying he can't be gainsaying we can't be gainsaying you can't be gainsaying they can't be gainsaying
Perfect
I can't have gainsaid you can't have gainsaid he can't have gainsaid we can't have gainsaid you can't have gainsaid they can't have gainsaid
V-ing perfect
I can't have been gainsaying you can't have been gainsaying he can't have been gainsaying we can't have been gainsaying you can't have been gainsaying they can't have been gainsaying
Interrogative form
Simple form
can I gainsay? can you gainsay? can he gainsay? can we gainsay? can you gainsay? can they gainsay?
V-ing form
can I be gainsaying? can you be gainsaying? can he be gainsaying? can we be gainsaying? can you be gainsaying? can they be gainsaying?
Perfect
can I have gainsaid? can you have gainsaid? can he have gainsaid? can we have gainsaid? can you have gainsaid? can they have gainsaid?
V-ing perfect
can I have been gainsaying? can you have been gainsaying? can he have been gainsaying? can we have been gainsaying? can you have been gainsaying? can they have been gainsaying?
Interro-negative form
Simple form
can't I gainsay? can't you gainsay? can't he gainsay? can't we gainsay? can't you gainsay? can't they gainsay?
V-ing form
can't I be gainsaying? can't you be gainsaying? can't he be gainsaying? can't we be gainsaying? can't you be gainsaying? can't they be gainsaying?
Perfect
can't I have gainsaid? can't you have gainsaid? can't he have gainsaid? can't we have gainsaid? can't you have gainsaid? can't they have gainsaid?
V-ing perfect
can't I have been gainsaying? can't you have been gainsaying? can't he have been gainsaying? can't we have been gainsaying? can't you have been gainsaying? can't they have been gainsaying?