I can declare you can declare he can declare we can declare you can declare they can declare
V-ing form
I can be declaring you can be declaring he can be declaring we can be declaring you can be declaring they can be declaring
Perfect
I can have declared you can have declared he can have declared we can have declared you can have declared they can have declared
V-ing perfect
I can have been declaring you can have been declaring he can have been declaring we can have been declaring you can have been declaring they can have been declaring
Negation
Simple form
I can't declare you can't declare he can't declare we can't declare you can't declare they can't declare
V-ing form
I can't be declaring you can't be declaring he can't be declaring we can't be declaring you can't be declaring they can't be declaring
Perfect
I can't have declared you can't have declared he can't have declared we can't have declared you can't have declared they can't have declared
V-ing perfect
I can't have been declaring you can't have been declaring he can't have been declaring we can't have been declaring you can't have been declaring they can't have been declaring
Interrogative form
Simple form
can I declare? can you declare? can he declare? can we declare? can you declare? can they declare?
V-ing form
can I be declaring? can you be declaring? can he be declaring? can we be declaring? can you be declaring? can they be declaring?
Perfect
can I have declared? can you have declared? can he have declared? can we have declared? can you have declared? can they have declared?
V-ing perfect
can I have been declaring? can you have been declaring? can he have been declaring? can we have been declaring? can you have been declaring? can they have been declaring?
Interro-negative form
Simple form
can't I declare? can't you declare? can't he declare? can't we declare? can't you declare? can't they declare?
V-ing form
can't I be declaring? can't you be declaring? can't he be declaring? can't we be declaring? can't you be declaring? can't they be declaring?
Perfect
can't I have declared? can't you have declared? can't he have declared? can't we have declared? can't you have declared? can't they have declared?
V-ing perfect
can't I have been declaring? can't you have been declaring? can't he have been declaring? can't we have been declaring? can't you have been declaring? can't they have been declaring?