could miscalculate
Regular verb: miscalculate - miscalculated- miscalculated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could miscalculate
you could miscalculate
he could miscalculate
we could miscalculate
you could miscalculate
they could miscalculate 	I could be miscalculating
you could be miscalculating
he could be miscalculating
we could be miscalculating
you could be miscalculating
they could be miscalculating	I could have miscalculated
you could have miscalculated
he could have miscalculated
we could have miscalculated
you could have miscalculated
they could have miscalculated	I could have been miscalculating
you could have been miscalculating
he could have been miscalculating
we could have been miscalculating
you could have been miscalculating
they could have been miscalculating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not miscalculate
you could not miscalculate
he could not miscalculate
we could not miscalculate
you could not miscalculate
they could not miscalculate 	I could not be miscalculating
you could not be miscalculating
he could not be miscalculating
we could not be miscalculating
you could not be miscalculating
they could not be miscalculating	I could not have miscalculated
you could not have miscalculated
he could not have miscalculated
we could not have miscalculated
you could not have miscalculated
they could not have miscalculated	I could not have been miscalculating
you could not have been miscalculating
he could not have been miscalculating
we could not have been miscalculating
you could not have been miscalculating
they could not have been miscalculating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I miscalculate?
could you miscalculate?
could he miscalculate?
could we miscalculate?
could you miscalculate?
could they miscalculate? 	could I be miscalculating?
could you be miscalculating?
could he be miscalculating?
could we be miscalculating?
could you be miscalculating?
could they be miscalculating? 	could I have miscalculated?
could you have miscalculated?
could he have miscalculated?
could we have miscalculated?
could you have miscalculated?
could they have miscalculated? 	could I have been miscalculating?
could you have been miscalculating?
could he have been miscalculating?
could we have been miscalculating?
could you have been miscalculating?
could they have been miscalculating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not miscalculate?
could you not miscalculate?
could he not miscalculate?
could we not miscalculate?
could you not miscalculate?
could they not miscalculate? 	could I not be miscalculating?
could you not be miscalculating?
could he not be miscalculating?
could we not be miscalculating?
could you not be miscalculating?
could they not be miscalculating? 	could I not have miscalculated?
could you not have miscalculated?
could he not have miscalculated?
could we not have miscalculated?
could you not have miscalculated?
could they not have miscalculated? 	could I not have been miscalculating?
could you not have been miscalculating?
could he not have been miscalculating?
could we not have been miscalculating?
could you not have been miscalculating?
could they not have been miscalculating?