could contour
Regular verb: contour - contoured- contoured

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could contour
you could contour
he could contour
we could contour
you could contour
they could contour 	I could be contouring
you could be contouring
he could be contouring
we could be contouring
you could be contouring
they could be contouring	I could have contoured
you could have contoured
he could have contoured
we could have contoured
you could have contoured
they could have contoured	I could have been contouring
you could have been contouring
he could have been contouring
we could have been contouring
you could have been contouring
they could have been contouring	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not contour
you could not contour
he could not contour
we could not contour
you could not contour
they could not contour 	I could not be contouring
you could not be contouring
he could not be contouring
we could not be contouring
you could not be contouring
they could not be contouring	I could not have contoured
you could not have contoured
he could not have contoured
we could not have contoured
you could not have contoured
they could not have contoured	I could not have been contouring
you could not have been contouring
he could not have been contouring
we could not have been contouring
you could not have been contouring
they could not have been contouring	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I contour?
could you contour?
could he contour?
could we contour?
could you contour?
could they contour? 	could I be contouring?
could you be contouring?
could he be contouring?
could we be contouring?
could you be contouring?
could they be contouring? 	could I have contoured?
could you have contoured?
could he have contoured?
could we have contoured?
could you have contoured?
could they have contoured? 	could I have been contouring?
could you have been contouring?
could he have been contouring?
could we have been contouring?
could you have been contouring?
could they have been contouring? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not contour?
could you not contour?
could he not contour?
could we not contour?
could you not contour?
could they not contour? 	could I not be contouring?
could you not be contouring?
could he not be contouring?
could we not be contouring?
could you not be contouring?
could they not be contouring? 	could I not have contoured?
could you not have contoured?
could he not have contoured?
could we not have contoured?
could you not have contoured?
could they not have contoured? 	could I not have been contouring?
could you not have been contouring?
could he not have been contouring?
could we not have been contouring?
could you not have been contouring?
could they not have been contouring?