could nickname
Regular verb: nickname - nicknamed- nicknamed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could nickname
you could nickname
she could nickname
we could nickname
you could nickname
they could nickname 	I could be nicknaming
you could be nicknaming
she could be nicknaming
we could be nicknaming
you could be nicknaming
they could be nicknaming	I could have nicknamed
you could have nicknamed
she could have nicknamed
we could have nicknamed
you could have nicknamed
they could have nicknamed	I could have been nicknaming
you could have been nicknaming
she could have been nicknaming
we could have been nicknaming
you could have been nicknaming
they could have been nicknaming	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't nickname
you couldn't nickname
she couldn't nickname
we couldn't nickname
you couldn't nickname
they couldn't nickname 	I couldn't be nicknaming
you couldn't be nicknaming
she couldn't be nicknaming
we couldn't be nicknaming
you couldn't be nicknaming
they couldn't be nicknaming	I couldn't have nicknamed
you couldn't have nicknamed
she couldn't have nicknamed
we couldn't have nicknamed
you couldn't have nicknamed
they couldn't have nicknamed	I couldn't have been nicknaming
you couldn't have been nicknaming
she couldn't have been nicknaming
we couldn't have been nicknaming
you couldn't have been nicknaming
they couldn't have been nicknaming	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I nickname?
could you nickname?
could she nickname?
could we nickname?
could you nickname?
could they nickname? 	could I be nicknaming?
could you be nicknaming?
could she be nicknaming?
could we be nicknaming?
could you be nicknaming?
could they be nicknaming? 	could I have nicknamed?
could you have nicknamed?
could she have nicknamed?
could we have nicknamed?
could you have nicknamed?
could they have nicknamed? 	could I have been nicknaming?
could you have been nicknaming?
could she have been nicknaming?
could we have been nicknaming?
could you have been nicknaming?
could they have been nicknaming? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I nickname?
couldn't you nickname?
couldn't she nickname?
couldn't we nickname?
couldn't you nickname?
couldn't they nickname? 	couldn't I be nicknaming?
couldn't you be nicknaming?
couldn't she be nicknaming?
couldn't we be nicknaming?
couldn't you be nicknaming?
couldn't they be nicknaming? 	couldn't I have nicknamed?
couldn't you have nicknamed?
couldn't she have nicknamed?
couldn't we have nicknamed?
couldn't you have nicknamed?
couldn't they have nicknamed? 	couldn't I have been nicknaming?
couldn't you have been nicknaming?
couldn't she have been nicknaming?
couldn't we have been nicknaming?
couldn't you have been nicknaming?
couldn't they have been nicknaming?