English verb conjugation
COULD JAB

Regular verb: jab - jabbed - jabbed

Affirmation

Simple form	V-ing form
I could jab you could jab he could jab we could jab you could jab they could jab	I could be jabbing you could be jabbing he could be jabbing we could be jabbing you could be jabbing they could be jabbing
Perfect	V-ing perfect
I could have jabbed you could have jabbed he could have jabbed we could have jabbed you could have jabbed they could have jabbed	I could have been jabbing you could have been jabbing he could have been jabbing we could have been jabbing you could have been jabbing they could have been jabbing

Negation

Simple form	V-ing form
I could not jab you could not jab he could not jab we could not jab you could not jab they could not jab	I could not be jabbing you could not be jabbing he could not be jabbing we could not be jabbing you could not be jabbing they could not be jabbing
Perfect	V-ing perfect
I could not have jabbed you could not have jabbed he could not have jabbed we could not have jabbed you could not have jabbed they could not have jabbed	I could not have been jabbing you could not have been jabbing he could not have been jabbing we could not have been jabbing you could not have been jabbing they could not have been jabbing

Interrogative form

Simple form	V-ing form
could I jab? could you jab? could he jab? could we jab? could you jab? could they jab?	could I be jabbing? could you be jabbing? could he be jabbing? could we be jabbing? could you be jabbing? could they be jabbing?
Perfect	V-ing perfect
could I have jabbed? could you have jabbed? could he have jabbed? could we have jabbed? could you have jabbed? could they have jabbed?	could I have been jabbing? could you have been jabbing? could he have been jabbing? could we have been jabbing? could you have been jabbing? could they have been jabbing?

Interro-negative form

Simple form	V-ing form
could I not jab? could you not jab? could he not jab? could we not jab? could you not jab? could they not jab?	could I not be jabbing? could you not be jabbing? could he not be jabbing? could we not be jabbing? could you not be jabbing? could they not be jabbing?
Perfect	V-ing perfect
could I not have jabbed? could you not have jabbed? could he not have jabbed? could we not have jabbed? could you not have jabbed? could they not have jabbed?	could I not have been jabbing? could you not have been jabbing? could he not have been jabbing? could we not have been jabbing? could you not have been jabbing? could they not have been jabbing?