English verb conjugation
COULD NAB

Regular verb: nab - nabbed - nabbed

Affirmation

Simple form	V-ing form
I could nab you could nab she could nab we could nab you could nab they could nab	I could be nabbing you could be nabbing she could be nabbing we could be nabbing you could be nabbing they could be nabbing
Perfect	V-ing perfect
I could have nabbed you could have nabbed she could have nabbed we could have nabbed you could have nabbed they could have nabbed	I could have been nabbing you could have been nabbing she could have been nabbing we could have been nabbing you could have been nabbing they could have been nabbing

Negation

Simple form	V-ing form
I could not nab you could not nab she could not nab we could not nab you could not nab they could not nab	I could not be nabbing you could not be nabbing she could not be nabbing we could not be nabbing you could not be nabbing they could not be nabbing
Perfect	V-ing perfect
I could not have nabbed you could not have nabbed she could not have nabbed we could not have nabbed you could not have nabbed they could not have nabbed	I could not have been nabbing you could not have been nabbing she could not have been nabbing we could not have been nabbing you could not have been nabbing they could not have been nabbing

Interrogative form

Simple form	V-ing form
could I nab? could you nab? could she nab? could we nab? could you nab? could they nab?	could I be nabbing? could you be nabbing? could she be nabbing? could we be nabbing? could you be nabbing? could they be nabbing?
Perfect	V-ing perfect
could I have nabbed? could you have nabbed? could she have nabbed? could we have nabbed? could you have nabbed? could they have nabbed?	could I have been nabbing? could you have been nabbing? could she have been nabbing? could we have been nabbing? could you have been nabbing? could they have been nabbing?

Interro-negative form

Simple form	V-ing form
could I not nab? could you not nab? could she not nab? could we not nab? could you not nab? could they not nab?	could I not be nabbing? could you not be nabbing? could she not be nabbing? could we not be nabbing? could you not be nabbing? could they not be nabbing?
Perfect	V-ing perfect
could I not have nabbed? could you not have nabbed? could she not have nabbed? could we not have nabbed? could you not have nabbed? could they not have nabbed?	could I not have been nabbing? could you not have been nabbing? could she not have been nabbing? could we not have been nabbing? could you not have been nabbing? could they not have been nabbing?