could shellac
Regular verb: shellac - shellaced- shellaced

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could shellac
you could shellac
she could shellac
we could shellac
you could shellac
they could shellac 	I could be shellacing
you could be shellacing
she could be shellacing
we could be shellacing
you could be shellacing
they could be shellacing	I could have shellaced
you could have shellaced
she could have shellaced
we could have shellaced
you could have shellaced
they could have shellaced	I could have been shellacing
you could have been shellacing
she could have been shellacing
we could have been shellacing
you could have been shellacing
they could have been shellacing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not shellac
you could not shellac
she could not shellac
we could not shellac
you could not shellac
they could not shellac 	I could not be shellacing
you could not be shellacing
she could not be shellacing
we could not be shellacing
you could not be shellacing
they could not be shellacing	I could not have shellaced
you could not have shellaced
she could not have shellaced
we could not have shellaced
you could not have shellaced
they could not have shellaced	I could not have been shellacing
you could not have been shellacing
she could not have been shellacing
we could not have been shellacing
you could not have been shellacing
they could not have been shellacing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I shellac?
could you shellac?
could she shellac?
could we shellac?
could you shellac?
could they shellac? 	could I be shellacing?
could you be shellacing?
could she be shellacing?
could we be shellacing?
could you be shellacing?
could they be shellacing? 	could I have shellaced?
could you have shellaced?
could she have shellaced?
could we have shellaced?
could you have shellaced?
could they have shellaced? 	could I have been shellacing?
could you have been shellacing?
could she have been shellacing?
could we have been shellacing?
could you have been shellacing?
could they have been shellacing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not shellac?
could you not shellac?
could she not shellac?
could we not shellac?
could you not shellac?
could they not shellac? 	could I not be shellacing?
could you not be shellacing?
could she not be shellacing?
could we not be shellacing?
could you not be shellacing?
could they not be shellacing? 	could I not have shellaced?
could you not have shellaced?
could she not have shellaced?
could we not have shellaced?
could you not have shellaced?
could they not have shellaced? 	could I not have been shellacing?
could you not have been shellacing?
could she not have been shellacing?
could we not have been shellacing?
could you not have been shellacing?
could they not have been shellacing?