Warning, this verb may not exist. Conjugation is given as example.
Affirmation
Simple form
I can warn warn you can warn warn he can warn warn we can warn warn you can warn warn they can warn warn
V-ing form
I can be warn warning you can be warn warning he can be warn warning we can be warn warning you can be warn warning they can be warn warning
Perfect
I can have warn warned you can have warn warned he can have warn warned we can have warn warned you can have warn warned they can have warn warned
V-ing perfect
I can have been warn warning you can have been warn warning he can have been warn warning we can have been warn warning you can have been warn warning they can have been warn warning
Negation
Simple form
I cannot warn warn you cannot warn warn he cannot warn warn we cannot warn warn you cannot warn warn they cannot warn warn
V-ing form
I cannot be warn warning you cannot be warn warning he cannot be warn warning we cannot be warn warning you cannot be warn warning they cannot be warn warning
Perfect
I cannot have warn warned you cannot have warn warned he cannot have warn warned we cannot have warn warned you cannot have warn warned they cannot have warn warned
V-ing perfect
I cannot have been warn warning you cannot have been warn warning he cannot have been warn warning we cannot have been warn warning you cannot have been warn warning they cannot have been warn warning
Interrogative form
Simple form
can I warn warn? can you warn warn? can he warn warn? can we warn warn? can you warn warn? can they warn warn?
V-ing form
can I be warn warning? can you be warn warning? can he be warn warning? can we be warn warning? can you be warn warning? can they be warn warning?
Perfect
can I have warn warned? can you have warn warned? can he have warn warned? can we have warn warned? can you have warn warned? can they have warn warned?
V-ing perfect
can I have been warn warning? can you have been warn warning? can he have been warn warning? can we have been warn warning? can you have been warn warning? can they have been warn warning?
Interro-negative form
Simple form
can I not warn warn? can you not warn warn? can he not warn warn? can we not warn warn? can you not warn warn? can they not warn warn?
V-ing form
can I not be warn warning? can you not be warn warning? can he not be warn warning? can we not be warn warning? can you not be warn warning? can they not be warn warning?
Perfect
can I not have warn warned? can you not have warn warned? can he not have warn warned? can we not have warn warned? can you not have warn warned? can they not have warn warned?
V-ing perfect
can I not have been warn warning? can you not have been warn warning? can he not have been warn warning? can we not have been warn warning? can you not have been warn warning? can they not have been warn warning?