could quickstep
Regular verb: quickstep - quicksteped- quicksteped

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could quickstep
you could quickstep
she could quickstep
we could quickstep
you could quickstep
they could quickstep 	I could be quicksteping
you could be quicksteping
she could be quicksteping
we could be quicksteping
you could be quicksteping
they could be quicksteping	I could have quicksteped
you could have quicksteped
she could have quicksteped
we could have quicksteped
you could have quicksteped
they could have quicksteped	I could have been quicksteping
you could have been quicksteping
she could have been quicksteping
we could have been quicksteping
you could have been quicksteping
they could have been quicksteping	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not quickstep
you could not quickstep
she could not quickstep
we could not quickstep
you could not quickstep
they could not quickstep 	I could not be quicksteping
you could not be quicksteping
she could not be quicksteping
we could not be quicksteping
you could not be quicksteping
they could not be quicksteping	I could not have quicksteped
you could not have quicksteped
she could not have quicksteped
we could not have quicksteped
you could not have quicksteped
they could not have quicksteped	I could not have been quicksteping
you could not have been quicksteping
she could not have been quicksteping
we could not have been quicksteping
you could not have been quicksteping
they could not have been quicksteping	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I quickstep?
could you quickstep?
could she quickstep?
could we quickstep?
could you quickstep?
could they quickstep? 	could I be quicksteping?
could you be quicksteping?
could she be quicksteping?
could we be quicksteping?
could you be quicksteping?
could they be quicksteping? 	could I have quicksteped?
could you have quicksteped?
could she have quicksteped?
could we have quicksteped?
could you have quicksteped?
could they have quicksteped? 	could I have been quicksteping?
could you have been quicksteping?
could she have been quicksteping?
could we have been quicksteping?
could you have been quicksteping?
could they have been quicksteping? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not quickstep?
could you not quickstep?
could she not quickstep?
could we not quickstep?
could you not quickstep?
could they not quickstep? 	could I not be quicksteping?
could you not be quicksteping?
could she not be quicksteping?
could we not be quicksteping?
could you not be quicksteping?
could they not be quicksteping? 	could I not have quicksteped?
could you not have quicksteped?
could she not have quicksteped?
could we not have quicksteped?
could you not have quicksteped?
could they not have quicksteped? 	could I not have been quicksteping?
could you not have been quicksteping?
could she not have been quicksteping?
could we not have been quicksteping?
could you not have been quicksteping?
could they not have been quicksteping?