I can affirm you can affirm he can affirm we can affirm you can affirm they can affirm
V-ing form
I can be affirming you can be affirming he can be affirming we can be affirming you can be affirming they can be affirming
Perfect
I can have affirmed you can have affirmed he can have affirmed we can have affirmed you can have affirmed they can have affirmed
V-ing perfect
I can have been affirming you can have been affirming he can have been affirming we can have been affirming you can have been affirming they can have been affirming
Negation
Simple form
I can't affirm you can't affirm he can't affirm we can't affirm you can't affirm they can't affirm
V-ing form
I can't be affirming you can't be affirming he can't be affirming we can't be affirming you can't be affirming they can't be affirming
Perfect
I can't have affirmed you can't have affirmed he can't have affirmed we can't have affirmed you can't have affirmed they can't have affirmed
V-ing perfect
I can't have been affirming you can't have been affirming he can't have been affirming we can't have been affirming you can't have been affirming they can't have been affirming
Interrogative form
Simple form
can I affirm? can you affirm? can he affirm? can we affirm? can you affirm? can they affirm?
V-ing form
can I be affirming? can you be affirming? can he be affirming? can we be affirming? can you be affirming? can they be affirming?
Perfect
can I have affirmed? can you have affirmed? can he have affirmed? can we have affirmed? can you have affirmed? can they have affirmed?
V-ing perfect
can I have been affirming? can you have been affirming? can he have been affirming? can we have been affirming? can you have been affirming? can they have been affirming?
Interro-negative form
Simple form
can't I affirm? can't you affirm? can't he affirm? can't we affirm? can't you affirm? can't they affirm?
V-ing form
can't I be affirming? can't you be affirming? can't he be affirming? can't we be affirming? can't you be affirming? can't they be affirming?
Perfect
can't I have affirmed? can't you have affirmed? can't he have affirmed? can't we have affirmed? can't you have affirmed? can't they have affirmed?
V-ing perfect
can't I have been affirming? can't you have been affirming? can't he have been affirming? can't we have been affirming? can't you have been affirming? can't they have been affirming?