English verb conjugation
COULD RECALCULATE

Regular verb: recalculate - recalculated - recalculated

Affirmation

Simple form	V-ing form
I could recalculate you could recalculate she could recalculate we could recalculate you could recalculate they could recalculate	I could be recalculating you could be recalculating she could be recalculating we could be recalculating you could be recalculating they could be recalculating
Perfect	V-ing perfect
I could have recalculated you could have recalculated she could have recalculated we could have recalculated you could have recalculated they could have recalculated	I could have been recalculating you could have been recalculating she could have been recalculating we could have been recalculating you could have been recalculating they could have been recalculating

Negation

Simple form	V-ing form
I couldn't recalculate you couldn't recalculate she couldn't recalculate we couldn't recalculate you couldn't recalculate they couldn't recalculate	I couldn't be recalculating you couldn't be recalculating she couldn't be recalculating we couldn't be recalculating you couldn't be recalculating they couldn't be recalculating
Perfect	V-ing perfect
I couldn't have recalculated you couldn't have recalculated she couldn't have recalculated we couldn't have recalculated you couldn't have recalculated they couldn't have recalculated	I couldn't have been recalculating you couldn't have been recalculating she couldn't have been recalculating we couldn't have been recalculating you couldn't have been recalculating they couldn't have been recalculating

Interrogative form

Simple form	V-ing form
could I recalculate? could you recalculate? could she recalculate? could we recalculate? could you recalculate? could they recalculate?	could I be recalculating? could you be recalculating? could she be recalculating? could we be recalculating? could you be recalculating? could they be recalculating?
Perfect	V-ing perfect
could I have recalculated? could you have recalculated? could she have recalculated? could we have recalculated? could you have recalculated? could they have recalculated?	could I have been recalculating? could you have been recalculating? could she have been recalculating? could we have been recalculating? could you have been recalculating? could they have been recalculating?

Interro-negative form

Simple form	V-ing form
couldn't I recalculate? couldn't you recalculate? couldn't she recalculate? couldn't we recalculate? couldn't you recalculate? couldn't they recalculate?	couldn't I be recalculating? couldn't you be recalculating? couldn't she be recalculating? couldn't we be recalculating? couldn't you be recalculating? couldn't they be recalculating?
Perfect	V-ing perfect
couldn't I have recalculated? couldn't you have recalculated? couldn't she have recalculated? couldn't we have recalculated? couldn't you have recalculated? couldn't they have recalculated?	couldn't I have been recalculating? couldn't you have been recalculating? couldn't she have been recalculating? couldn't we have been recalculating? couldn't you have been recalculating? couldn't they have been recalculating?