English verb conjugation
COULD MISCALCULATE

Regular verb: miscalculate - miscalculated - miscalculated

Affirmation

Simple form	V-ing form
I could miscalculate you could miscalculate she could miscalculate we could miscalculate you could miscalculate they could miscalculate	I could be miscalculating you could be miscalculating she could be miscalculating we could be miscalculating you could be miscalculating they could be miscalculating
Perfect	V-ing perfect
I could have miscalculated you could have miscalculated she 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 she 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
I couldn't miscalculate you couldn't miscalculate she couldn't miscalculate we couldn't miscalculate you couldn't miscalculate they couldn't miscalculate	I couldn't be miscalculating you couldn't be miscalculating she couldn't be miscalculating we couldn't be miscalculating you couldn't be miscalculating they couldn't be miscalculating
Perfect	V-ing perfect
I couldn't have miscalculated you couldn't have miscalculated she couldn't have miscalculated we couldn't have miscalculated you couldn't have miscalculated they couldn't have miscalculated	I couldn't have been miscalculating you couldn't have been miscalculating she couldn't have been miscalculating we couldn't have been miscalculating you couldn't have been miscalculating they couldn't have been miscalculating

Interrogative form

Simple form	V-ing form
could I miscalculate? could you miscalculate? could she miscalculate? could we miscalculate? could you miscalculate? could they miscalculate?	could I be miscalculating? could you be miscalculating? could she be miscalculating? could we be miscalculating? could you be miscalculating? could they be miscalculating?
Perfect	V-ing perfect
could I have miscalculated? could you have miscalculated? could she 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 she 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
couldn't I miscalculate? couldn't you miscalculate? couldn't she miscalculate? couldn't we miscalculate? couldn't you miscalculate? couldn't they miscalculate?	couldn't I be miscalculating? couldn't you be miscalculating? couldn't she be miscalculating? couldn't we be miscalculating? couldn't you be miscalculating? couldn't they be miscalculating?
Perfect	V-ing perfect
couldn't I have miscalculated? couldn't you have miscalculated? couldn't she have miscalculated? couldn't we have miscalculated? couldn't you have miscalculated? couldn't they have miscalculated?	couldn't I have been miscalculating? couldn't you have been miscalculating? couldn't she have been miscalculating? couldn't we have been miscalculating? couldn't you have been miscalculating? couldn't they have been miscalculating?