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 couldn't mistake you couldn't mistake he couldn't mistake we couldn't mistake you couldn't mistake they couldn't mistake	I couldn't be mistaking you couldn't be mistaking he couldn't be mistaking we couldn't be mistaking you couldn't be mistaking they couldn't be mistaking
Perfect	V-ing perfect
I couldn't have mistaken you couldn't have mistaken he couldn't have mistaken we couldn't have mistaken you couldn't have mistaken they couldn't have mistaken	I couldn't have been mistaking you couldn't have been mistaking he couldn't have been mistaking we couldn't have been mistaking you couldn't have been mistaking they couldn't 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
couldn't I mistake? couldn't you mistake? couldn't he mistake? couldn't we mistake? couldn't you mistake? couldn't they mistake?	couldn't I be mistaking? couldn't you be mistaking? couldn't he be mistaking? couldn't we be mistaking? couldn't you be mistaking? couldn't they be mistaking?
Perfect	V-ing perfect
couldn't I have mistaken? couldn't you have mistaken? couldn't he have mistaken? couldn't we have mistaken? couldn't you have mistaken? couldn't they have mistaken?	couldn't I have been mistaking? couldn't you have been mistaking? couldn't he have been mistaking? couldn't we have been mistaking? couldn't you have been mistaking? couldn't they have been mistaking?