English verb conjugation
COULD NICKNAME

Regular verb: nickname - nicknamed - nicknamed

Affirmation

Simple form	V-ing form
I could nickname you could nickname he could nickname we could nickname you could nickname they could nickname	I could be nicknaming you could be nicknaming he could be nicknaming we could be nicknaming you could be nicknaming they could be nicknaming
Perfect	V-ing perfect
I could have nicknamed you could have nicknamed he 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 he 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
I could not nickname you could not nickname he could not nickname we could not nickname you could not nickname they could not nickname	I could not be nicknaming you could not be nicknaming he could not be nicknaming we could not be nicknaming you could not be nicknaming they could not be nicknaming
Perfect	V-ing perfect
I could not have nicknamed you could not have nicknamed he could not have nicknamed we could not have nicknamed you could not have nicknamed they could not have nicknamed	I could not have been nicknaming you could not have been nicknaming he could not have been nicknaming we could not have been nicknaming you could not have been nicknaming they could not have been nicknaming

Interrogative form

Simple form	V-ing form
could I nickname? could you nickname? could he nickname? could we nickname? could you nickname? could they nickname?	could I be nicknaming? could you be nicknaming? could he be nicknaming? could we be nicknaming? could you be nicknaming? could they be nicknaming?
Perfect	V-ing perfect
could I have nicknamed? could you have nicknamed? could he 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 he 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
could I not nickname? could you not nickname? could he not nickname? could we not nickname? could you not nickname? could they not nickname?	could I not be nicknaming? could you not be nicknaming? could he not be nicknaming? could we not be nicknaming? could you not be nicknaming? could they not be nicknaming?
Perfect	V-ing perfect
could I not have nicknamed? could you not have nicknamed? could he not have nicknamed? could we not have nicknamed? could you not have nicknamed? could they not have nicknamed?	could I not have been nicknaming? could you not have been nicknaming? could he not have been nicknaming? could we not have been nicknaming? could you not have been nicknaming? could they not have been nicknaming?