English verb conjugation
COULD INCURVE

Regular verb: incurve - incurved - incurved

Affirmation

Simple form	V-ing form
I could incurve you could incurve he could incurve we could incurve you could incurve they could incurve	I could be incurving you could be incurving he could be incurving we could be incurving you could be incurving they could be incurving
Perfect	V-ing perfect
I could have incurved you could have incurved he could have incurved we could have incurved you could have incurved they could have incurved	I could have been incurving you could have been incurving he could have been incurving we could have been incurving you could have been incurving they could have been incurving

Negation

Simple form	V-ing form
I could not incurve you could not incurve he could not incurve we could not incurve you could not incurve they could not incurve	I could not be incurving you could not be incurving he could not be incurving we could not be incurving you could not be incurving they could not be incurving
Perfect	V-ing perfect
I could not have incurved you could not have incurved he could not have incurved we could not have incurved you could not have incurved they could not have incurved	I could not have been incurving you could not have been incurving he could not have been incurving we could not have been incurving you could not have been incurving they could not have been incurving

Interrogative form

Simple form	V-ing form
could I incurve? could you incurve? could he incurve? could we incurve? could you incurve? could they incurve?	could I be incurving? could you be incurving? could he be incurving? could we be incurving? could you be incurving? could they be incurving?
Perfect	V-ing perfect
could I have incurved? could you have incurved? could he have incurved? could we have incurved? could you have incurved? could they have incurved?	could I have been incurving? could you have been incurving? could he have been incurving? could we have been incurving? could you have been incurving? could they have been incurving?

Interro-negative form

Simple form	V-ing form
could I not incurve? could you not incurve? could he not incurve? could we not incurve? could you not incurve? could they not incurve?	could I not be incurving? could you not be incurving? could he not be incurving? could we not be incurving? could you not be incurving? could they not be incurving?
Perfect	V-ing perfect
could I not have incurved? could you not have incurved? could he not have incurved? could we not have incurved? could you not have incurved? could they not have incurved?	could I not have been incurving? could you not have been incurving? could he not have been incurving? could we not have been incurving? could you not have been incurving? could they not have been incurving?