could incurvate
Regular verb: incurvate - incurvated- incurvated

Affirmation 	
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I could incurvate
you could incurvate
he could incurvate
we could incurvate
you could incurvate
they could incurvate 	I could be incurvating
you could be incurvating
he could be incurvating
we could be incurvating
you could be incurvating
they could be incurvating	I could have incurvated
you could have incurvated
he could have incurvated
we could have incurvated
you could have incurvated
they could have incurvated	I could have been incurvating
you could have been incurvating
he could have been incurvating
we could have been incurvating
you could have been incurvating
they could have been incurvating	

Negation 	
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I could not incurvate
you could not incurvate
he could not incurvate
we could not incurvate
you could not incurvate
they could not incurvate 	I could not be incurvating
you could not be incurvating
he could not be incurvating
we could not be incurvating
you could not be incurvating
they could not be incurvating	I could not have incurvated
you could not have incurvated
he could not have incurvated
we could not have incurvated
you could not have incurvated
they could not have incurvated	I could not have been incurvating
you could not have been incurvating
he could not have been incurvating
we could not have been incurvating
you could not have been incurvating
they could not have been incurvating	

Interrogative form 	
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could I incurvate?
could you incurvate?
could he incurvate?
could we incurvate?
could you incurvate?
could they incurvate? 	could I be incurvating?
could you be incurvating?
could he be incurvating?
could we be incurvating?
could you be incurvating?
could they be incurvating? 	could I have incurvated?
could you have incurvated?
could he have incurvated?
could we have incurvated?
could you have incurvated?
could they have incurvated? 	could I have been incurvating?
could you have been incurvating?
could he have been incurvating?
could we have been incurvating?
could you have been incurvating?
could they have been incurvating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not incurvate?
could you not incurvate?
could he not incurvate?
could we not incurvate?
could you not incurvate?
could they not incurvate? 	could I not be incurvating?
could you not be incurvating?
could he not be incurvating?
could we not be incurvating?
could you not be incurvating?
could they not be incurvating? 	could I not have incurvated?
could you not have incurvated?
could he not have incurvated?
could we not have incurvated?
could you not have incurvated?
could they not have incurvated? 	could I not have been incurvating?
could you not have been incurvating?
could he not have been incurvating?
could we not have been incurvating?
could you not have been incurvating?
could they not have been incurvating?