English verb conjugation
COULD SMACK

Regular verb: smack - smacked - smacked

Affirmation

Simple form	V-ing form
I could smack you could smack he could smack we could smack you could smack they could smack	I could be smacking you could be smacking he could be smacking we could be smacking you could be smacking they could be smacking
Perfect	V-ing perfect
I could have smacked you could have smacked he could have smacked we could have smacked you could have smacked they could have smacked	I could have been smacking you could have been smacking he could have been smacking we could have been smacking you could have been smacking they could have been smacking

Negation

Simple form	V-ing form
I couldn't smack you couldn't smack he couldn't smack we couldn't smack you couldn't smack they couldn't smack	I couldn't be smacking you couldn't be smacking he couldn't be smacking we couldn't be smacking you couldn't be smacking they couldn't be smacking
Perfect	V-ing perfect
I couldn't have smacked you couldn't have smacked he couldn't have smacked we couldn't have smacked you couldn't have smacked they couldn't have smacked	I couldn't have been smacking you couldn't have been smacking he couldn't have been smacking we couldn't have been smacking you couldn't have been smacking they couldn't have been smacking

Interrogative form

Simple form	V-ing form
could I smack? could you smack? could he smack? could we smack? could you smack? could they smack?	could I be smacking? could you be smacking? could he be smacking? could we be smacking? could you be smacking? could they be smacking?
Perfect	V-ing perfect
could I have smacked? could you have smacked? could he have smacked? could we have smacked? could you have smacked? could they have smacked?	could I have been smacking? could you have been smacking? could he have been smacking? could we have been smacking? could you have been smacking? could they have been smacking?

Interro-negative form

Simple form	V-ing form
couldn't I smack? couldn't you smack? couldn't he smack? couldn't we smack? couldn't you smack? couldn't they smack?	couldn't I be smacking? couldn't you be smacking? couldn't he be smacking? couldn't we be smacking? couldn't you be smacking? couldn't they be smacking?
Perfect	V-ing perfect
couldn't I have smacked? couldn't you have smacked? couldn't he have smacked? couldn't we have smacked? couldn't you have smacked? couldn't they have smacked?	couldn't I have been smacking? couldn't you have been smacking? couldn't he have been smacking? couldn't we have been smacking? couldn't you have been smacking? couldn't they have been smacking?