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 couldn't kern you couldn't kern he couldn't kern we couldn't kern you couldn't kern they couldn't kern	I couldn't be kerning you couldn't be kerning he couldn't be kerning we couldn't be kerning you couldn't be kerning they couldn't be kerning
Perfect	V-ing perfect
I couldn't have kerned you couldn't have kerned he couldn't have kerned we couldn't have kerned you couldn't have kerned they couldn't have kerned	I couldn't have been kerning you couldn't have been kerning he couldn't have been kerning we couldn't have been kerning you couldn't have been kerning they couldn't 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
couldn't I kern? couldn't you kern? couldn't he kern? couldn't we kern? couldn't you kern? couldn't they kern?	couldn't I be kerning? couldn't you be kerning? couldn't he be kerning? couldn't we be kerning? couldn't you be kerning? couldn't they be kerning?
Perfect	V-ing perfect
couldn't I have kerned? couldn't you have kerned? couldn't he have kerned? couldn't we have kerned? couldn't you have kerned? couldn't they have kerned?	couldn't I have been kerning? couldn't you have been kerning? couldn't he have been kerning? couldn't we have been kerning? couldn't you have been kerning? couldn't they have been kerning?