could incurve
Regular verb: incurve - incurved- incurved

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
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	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 	Perfect 	V-ing perfect 	
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	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 	Perfect 	V-ing perfect 	
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? 	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 	Perfect 	V-ing perfect 	
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? 	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?