English verb conjugation
COULD SMUDGE

Regular verb: smudge - smudged - smudged

Affirmation

Simple form	V-ing form
I could smudge you could smudge she could smudge we could smudge you could smudge they could smudge	I could be smudging you could be smudging she could be smudging we could be smudging you could be smudging they could be smudging
Perfect	V-ing perfect
I could have smudged you could have smudged she could have smudged we could have smudged you could have smudged they could have smudged	I could have been smudging you could have been smudging she could have been smudging we could have been smudging you could have been smudging they could have been smudging

Negation

Simple form	V-ing form
I could not smudge you could not smudge she could not smudge we could not smudge you could not smudge they could not smudge	I could not be smudging you could not be smudging she could not be smudging we could not be smudging you could not be smudging they could not be smudging
Perfect	V-ing perfect
I could not have smudged you could not have smudged she could not have smudged we could not have smudged you could not have smudged they could not have smudged	I could not have been smudging you could not have been smudging she could not have been smudging we could not have been smudging you could not have been smudging they could not have been smudging

Interrogative form

Simple form	V-ing form
could I smudge? could you smudge? could she smudge? could we smudge? could you smudge? could they smudge?	could I be smudging? could you be smudging? could she be smudging? could we be smudging? could you be smudging? could they be smudging?
Perfect	V-ing perfect
could I have smudged? could you have smudged? could she have smudged? could we have smudged? could you have smudged? could they have smudged?	could I have been smudging? could you have been smudging? could she have been smudging? could we have been smudging? could you have been smudging? could they have been smudging?

Interro-negative form

Simple form	V-ing form
could I not smudge? could you not smudge? could she not smudge? could we not smudge? could you not smudge? could they not smudge?	could I not be smudging? could you not be smudging? could she not be smudging? could we not be smudging? could you not be smudging? could they not be smudging?
Perfect	V-ing perfect
could I not have smudged? could you not have smudged? could she not have smudged? could we not have smudged? could you not have smudged? could they not have smudged?	could I not have been smudging? could you not have been smudging? could she not have been smudging? could we not have been smudging? could you not have been smudging? could they not have been smudging?