English verb conjugation
COULD PREFORMULATE

Regular verb: preformulate - preformulated - preformulated

Affirmation

Simple form	V-ing form
I could preformulate you could preformulate she could preformulate we could preformulate you could preformulate they could preformulate	I could be preformulating you could be preformulating she could be preformulating we could be preformulating you could be preformulating they could be preformulating
Perfect	V-ing perfect
I could have preformulated you could have preformulated she could have preformulated we could have preformulated you could have preformulated they could have preformulated	I could have been preformulating you could have been preformulating she could have been preformulating we could have been preformulating you could have been preformulating they could have been preformulating

Negation

Simple form	V-ing form
I could not preformulate you could not preformulate she could not preformulate we could not preformulate you could not preformulate they could not preformulate	I could not be preformulating you could not be preformulating she could not be preformulating we could not be preformulating you could not be preformulating they could not be preformulating
Perfect	V-ing perfect
I could not have preformulated you could not have preformulated she could not have preformulated we could not have preformulated you could not have preformulated they could not have preformulated	I could not have been preformulating you could not have been preformulating she could not have been preformulating we could not have been preformulating you could not have been preformulating they could not have been preformulating

Interrogative form

Simple form	V-ing form
could I preformulate? could you preformulate? could she preformulate? could we preformulate? could you preformulate? could they preformulate?	could I be preformulating? could you be preformulating? could she be preformulating? could we be preformulating? could you be preformulating? could they be preformulating?
Perfect	V-ing perfect
could I have preformulated? could you have preformulated? could she have preformulated? could we have preformulated? could you have preformulated? could they have preformulated?	could I have been preformulating? could you have been preformulating? could she have been preformulating? could we have been preformulating? could you have been preformulating? could they have been preformulating?

Interro-negative form

Simple form	V-ing form
could I not preformulate? could you not preformulate? could she not preformulate? could we not preformulate? could you not preformulate? could they not preformulate?	could I not be preformulating? could you not be preformulating? could she not be preformulating? could we not be preformulating? could you not be preformulating? could they not be preformulating?
Perfect	V-ing perfect
could I not have preformulated? could you not have preformulated? could she not have preformulated? could we not have preformulated? could you not have preformulated? could they not have preformulated?	could I not have been preformulating? could you not have been preformulating? could she not have been preformulating? could we not have been preformulating? could you not have been preformulating? could they not have been preformulating?