English verb conjugation
COULD ASSURE

Regular verb: assure - assured - assured

Affirmation

Simple form	V-ing form
I could assure you could assure she could assure we could assure you could assure they could assure	I could be assuring you could be assuring she could be assuring we could be assuring you could be assuring they could be assuring
Perfect	V-ing perfect
I could have assured you could have assured she could have assured we could have assured you could have assured they could have assured	I could have been assuring you could have been assuring she could have been assuring we could have been assuring you could have been assuring they could have been assuring

Negation

Simple form	V-ing form
I could not assure you could not assure she could not assure we could not assure you could not assure they could not assure	I could not be assuring you could not be assuring she could not be assuring we could not be assuring you could not be assuring they could not be assuring
Perfect	V-ing perfect
I could not have assured you could not have assured she could not have assured we could not have assured you could not have assured they could not have assured	I could not have been assuring you could not have been assuring she could not have been assuring we could not have been assuring you could not have been assuring they could not have been assuring

Interrogative form

Simple form	V-ing form
could I assure? could you assure? could she assure? could we assure? could you assure? could they assure?	could I be assuring? could you be assuring? could she be assuring? could we be assuring? could you be assuring? could they be assuring?
Perfect	V-ing perfect
could I have assured? could you have assured? could she have assured? could we have assured? could you have assured? could they have assured?	could I have been assuring? could you have been assuring? could she have been assuring? could we have been assuring? could you have been assuring? could they have been assuring?

Interro-negative form

Simple form	V-ing form
could I not assure? could you not assure? could she not assure? could we not assure? could you not assure? could they not assure?	could I not be assuring? could you not be assuring? could she not be assuring? could we not be assuring? could you not be assuring? could they not be assuring?
Perfect	V-ing perfect
could I not have assured? could you not have assured? could she not have assured? could we not have assured? could you not have assured? could they not have assured?	could I not have been assuring? could you not have been assuring? could she not have been assuring? could we not have been assuring? could you not have been assuring? could they not have been assuring?