English verb conjugation
CAN SMUDGE

Regular verb: smudge - smudged - smudged

Affirmation

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

Negation

Simple form	V-ing form
I can't smudge you can't smudge he can't smudge we can't smudge you can't smudge they can't smudge	I can't be smudging you can't be smudging he can't be smudging we can't be smudging you can't be smudging they can't be smudging
Perfect	V-ing perfect
I can't have smudged you can't have smudged he can't have smudged we can't have smudged you can't have smudged they can't have smudged	I can't have been smudging you can't have been smudging he can't have been smudging we can't have been smudging you can't have been smudging they can't have been smudging

Interrogative form

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

Interro-negative form

Simple form	V-ing form
can't I smudge? can't you smudge? can't he smudge? can't we smudge? can't you smudge? can't they smudge?	can't I be smudging? can't you be smudging? can't he be smudging? can't we be smudging? can't you be smudging? can't they be smudging?
Perfect	V-ing perfect
can't I have smudged? can't you have smudged? can't he have smudged? can't we have smudged? can't you have smudged? can't they have smudged?	can't I have been smudging? can't you have been smudging? can't he have been smudging? can't we have been smudging? can't you have been smudging? can't they have been smudging?