English verb conjugation
COULD KERN

Regular verb: kern - kerned - kerned

Affirmation

Simple form	V-ing form
I could kern you could kern he could kern we could kern you could kern they could kern	I could be kerning you could be kerning he could be kerning we could be kerning you could be kerning they could be kerning
Perfect	V-ing perfect
I could have kerned you could have kerned he could have kerned we could have kerned you could have kerned they could have kerned	I could have been kerning you could have been kerning he could have been kerning we could have been kerning you could have been kerning they could have been kerning

Negation

Simple form	V-ing form
I could not kern you could not kern he could not kern we could not kern you could not kern they could not kern	I could not be kerning you could not be kerning he could not be kerning we could not be kerning you could not be kerning they could not be kerning
Perfect	V-ing perfect
I could not have kerned you could not have kerned he could not have kerned we could not have kerned you could not have kerned they could not have kerned	I could not have been kerning you could not have been kerning he could not have been kerning we could not have been kerning you could not have been kerning they could not have been kerning

Interrogative form

Simple form	V-ing form
could I kern? could you kern? could he kern? could we kern? could you kern? could they kern?	could I be kerning? could you be kerning? could he be kerning? could we be kerning? could you be kerning? could they be kerning?
Perfect	V-ing perfect
could I have kerned? could you have kerned? could he have kerned? could we have kerned? could you have kerned? could they have kerned?	could I have been kerning? could you have been kerning? could he have been kerning? could we have been kerning? could you have been kerning? could they have been kerning?

Interro-negative form

Simple form	V-ing form
could I not kern? could you not kern? could he not kern? could we not kern? could you not kern? could they not kern?	could I not be kerning? could you not be kerning? could he not be kerning? could we not be kerning? could you not be kerning? could they not be kerning?
Perfect	V-ing perfect
could I not have kerned? could you not have kerned? could he not have kerned? could we not have kerned? could you not have kerned? could they not have kerned?	could I not have been kerning? could you not have been kerning? could he not have been kerning? could we not have been kerning? could you not have been kerning? could they not have been kerning?