could riposte
Regular verb: riposte - riposted- riposted

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could riposte
you could riposte
she could riposte
we could riposte
you could riposte
they could riposte 	I could be riposting
you could be riposting
she could be riposting
we could be riposting
you could be riposting
they could be riposting	I could have riposted
you could have riposted
she could have riposted
we could have riposted
you could have riposted
they could have riposted	I could have been riposting
you could have been riposting
she could have been riposting
we could have been riposting
you could have been riposting
they could have been riposting	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't riposte
you couldn't riposte
she couldn't riposte
we couldn't riposte
you couldn't riposte
they couldn't riposte 	I couldn't be riposting
you couldn't be riposting
she couldn't be riposting
we couldn't be riposting
you couldn't be riposting
they couldn't be riposting	I couldn't have riposted
you couldn't have riposted
she couldn't have riposted
we couldn't have riposted
you couldn't have riposted
they couldn't have riposted	I couldn't have been riposting
you couldn't have been riposting
she couldn't have been riposting
we couldn't have been riposting
you couldn't have been riposting
they couldn't have been riposting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I riposte?
could you riposte?
could she riposte?
could we riposte?
could you riposte?
could they riposte? 	could I be riposting?
could you be riposting?
could she be riposting?
could we be riposting?
could you be riposting?
could they be riposting? 	could I have riposted?
could you have riposted?
could she have riposted?
could we have riposted?
could you have riposted?
could they have riposted? 	could I have been riposting?
could you have been riposting?
could she have been riposting?
could we have been riposting?
could you have been riposting?
could they have been riposting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I riposte?
couldn't you riposte?
couldn't she riposte?
couldn't we riposte?
couldn't you riposte?
couldn't they riposte? 	couldn't I be riposting?
couldn't you be riposting?
couldn't she be riposting?
couldn't we be riposting?
couldn't you be riposting?
couldn't they be riposting? 	couldn't I have riposted?
couldn't you have riposted?
couldn't she have riposted?
couldn't we have riposted?
couldn't you have riposted?
couldn't they have riposted? 	couldn't I have been riposting?
couldn't you have been riposting?
couldn't she have been riposting?
couldn't we have been riposting?
couldn't you have been riposting?
couldn't they have been riposting?