English verb conjugation
CAN WARN WARN

Regular verb: warn warn - warn warned - warn warned

Warning, this verb may not exist. Conjugation is given as example.

Affirmation

Simple form	V-ing form
I can warn warn you can warn warn she can warn warn we can warn warn you can warn warn they can warn warn	I can be warn warning you can be warn warning she can be warn warning we can be warn warning you can be warn warning they can be warn warning
Perfect	V-ing perfect
I can have warn warned you can have warn warned she can have warn warned we can have warn warned you can have warn warned they can have warn warned	I can have been warn warning you can have been warn warning she 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	V-ing form
I can't warn warn you can't warn warn she can't warn warn we can't warn warn you can't warn warn they can't warn warn	I can't be warn warning you can't be warn warning she can't be warn warning we can't be warn warning you can't be warn warning they can't be warn warning
Perfect	V-ing perfect
I can't have warn warned you can't have warn warned she can't have warn warned we can't have warn warned you can't have warn warned they can't have warn warned	I can't have been warn warning you can't have been warn warning she can't have been warn warning we can't have been warn warning you can't have been warn warning they can't have been warn warning

Interrogative form

Simple form	V-ing form
can I warn warn? can you warn warn? can she warn warn? can we warn warn? can you warn warn? can they warn warn?	can I be warn warning? can you be warn warning? can she be warn warning? can we be warn warning? can you be warn warning? can they be warn warning?
Perfect	V-ing perfect
can I have warn warned? can you have warn warned? can she have warn warned? can we have warn warned? can you have warn warned? can they have warn warned?	can I have been warn warning? can you have been warn warning? can she 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	V-ing form
can't I warn warn? can't you warn warn? can't she warn warn? can't we warn warn? can't you warn warn? can't they warn warn?	can't I be warn warning? can't you be warn warning? can't she be warn warning? can't we be warn warning? can't you be warn warning? can't they be warn warning?
Perfect	V-ing perfect
can't I have warn warned? can't you have warn warned? can't she have warn warned? can't we have warn warned? can't you have warn warned? can't they have warn warned?	can't I have been warn warning? can't you have been warn warning? can't she have been warn warning? can't we have been warn warning? can't you have been warn warning? can't they have been warn warning?