could smack
Regular verb: smack - smacked- smacked

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