English verb conjugation
COULD MISTAKE

Irregular verb: mistake - mistook - mistaken

Affirmation

Simple form	V-ing form
I could mistake you could mistake he could mistake we could mistake you could mistake they could mistake	I could be mistaking you could be mistaking he could be mistaking we could be mistaking you could be mistaking they could be mistaking
Perfect	V-ing perfect
I could have mistaken you could have mistaken he could have mistaken we could have mistaken you could have mistaken they could have mistaken	I could have been mistaking you could have been mistaking he could have been mistaking we could have been mistaking you could have been mistaking they could have been mistaking

Negation

Simple form	V-ing form
I could not mistake you could not mistake he could not mistake we could not mistake you could not mistake they could not mistake	I could not be mistaking you could not be mistaking he could not be mistaking we could not be mistaking you could not be mistaking they could not be mistaking
Perfect	V-ing perfect
I could not have mistaken you could not have mistaken he could not have mistaken we could not have mistaken you could not have mistaken they could not have mistaken	I could not have been mistaking you could not have been mistaking he could not have been mistaking we could not have been mistaking you could not have been mistaking they could not have been mistaking

Interrogative form

Simple form	V-ing form
could I mistake? could you mistake? could he mistake? could we mistake? could you mistake? could they mistake?	could I be mistaking? could you be mistaking? could he be mistaking? could we be mistaking? could you be mistaking? could they be mistaking?
Perfect	V-ing perfect
could I have mistaken? could you have mistaken? could he have mistaken? could we have mistaken? could you have mistaken? could they have mistaken?	could I have been mistaking? could you have been mistaking? could he have been mistaking? could we have been mistaking? could you have been mistaking? could they have been mistaking?

Interro-negative form

Simple form	V-ing form
could I not mistake? could you not mistake? could he not mistake? could we not mistake? could you not mistake? could they not mistake?	could I not be mistaking? could you not be mistaking? could he not be mistaking? could we not be mistaking? could you not be mistaking? could they not be mistaking?
Perfect	V-ing perfect
could I not have mistaken? could you not have mistaken? could he not have mistaken? could we not have mistaken? could you not have mistaken? could they not have mistaken?	could I not have been mistaking? could you not have been mistaking? could he not have been mistaking? could we not have been mistaking? could you not have been mistaking? could they not have been mistaking?