could involute
Regular verb: involute - involuted- involuted

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could involute
you could involute
he could involute
we could involute
you could involute
they could involute 	I could be involuting
you could be involuting
he could be involuting
we could be involuting
you could be involuting
they could be involuting	I could have involuted
you could have involuted
he could have involuted
we could have involuted
you could have involuted
they could have involuted	I could have been involuting
you could have been involuting
he could have been involuting
we could have been involuting
you could have been involuting
they could have been involuting	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not involute
you could not involute
he could not involute
we could not involute
you could not involute
they could not involute 	I could not be involuting
you could not be involuting
he could not be involuting
we could not be involuting
you could not be involuting
they could not be involuting	I could not have involuted
you could not have involuted
he could not have involuted
we could not have involuted
you could not have involuted
they could not have involuted	I could not have been involuting
you could not have been involuting
he could not have been involuting
we could not have been involuting
you could not have been involuting
they could not have been involuting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I involute?
could you involute?
could he involute?
could we involute?
could you involute?
could they involute? 	could I be involuting?
could you be involuting?
could he be involuting?
could we be involuting?
could you be involuting?
could they be involuting? 	could I have involuted?
could you have involuted?
could he have involuted?
could we have involuted?
could you have involuted?
could they have involuted? 	could I have been involuting?
could you have been involuting?
could he have been involuting?
could we have been involuting?
could you have been involuting?
could they have been involuting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not involute?
could you not involute?
could he not involute?
could we not involute?
could you not involute?
could they not involute? 	could I not be involuting?
could you not be involuting?
could he not be involuting?
could we not be involuting?
could you not be involuting?
could they not be involuting? 	could I not have involuted?
could you not have involuted?
could he not have involuted?
could we not have involuted?
could you not have involuted?
could they not have involuted? 	could I not have been involuting?
could you not have been involuting?
could he not have been involuting?
could we not have been involuting?
could you not have been involuting?
could they not have been involuting?