English verb conjugation
COULD CHURN

Regular verb: churn - churned - churned

Affirmation

Simple form	V-ing form
I could churn you could churn he could churn we could churn you could churn they could churn	I could be churning you could be churning he could be churning we could be churning you could be churning they could be churning
Perfect	V-ing perfect
I could have churned you could have churned he could have churned we could have churned you could have churned they could have churned	I could have been churning you could have been churning he could have been churning we could have been churning you could have been churning they could have been churning

Negation

Simple form	V-ing form
I could not churn you could not churn he could not churn we could not churn you could not churn they could not churn	I could not be churning you could not be churning he could not be churning we could not be churning you could not be churning they could not be churning
Perfect	V-ing perfect
I could not have churned you could not have churned he could not have churned we could not have churned you could not have churned they could not have churned	I could not have been churning you could not have been churning he could not have been churning we could not have been churning you could not have been churning they could not have been churning

Interrogative form

Simple form	V-ing form
could I churn? could you churn? could he churn? could we churn? could you churn? could they churn?	could I be churning? could you be churning? could he be churning? could we be churning? could you be churning? could they be churning?
Perfect	V-ing perfect
could I have churned? could you have churned? could he have churned? could we have churned? could you have churned? could they have churned?	could I have been churning? could you have been churning? could he have been churning? could we have been churning? could you have been churning? could they have been churning?

Interro-negative form

Simple form	V-ing form
could I not churn? could you not churn? could he not churn? could we not churn? could you not churn? could they not churn?	could I not be churning? could you not be churning? could he not be churning? could we not be churning? could you not be churning? could they not be churning?
Perfect	V-ing perfect
could I not have churned? could you not have churned? could he not have churned? could we not have churned? could you not have churned? could they not have churned?	could I not have been churning? could you not have been churning? could he not have been churning? could we not have been churning? could you not have been churning? could they not have been churning?