English verb conjugation
COULD ASSURE

Regular verb: assure - assured - assured

Affirmation

Simple form	V-ing form
I could assure you could assure he could assure we could assure you could assure they could assure	I could be assuring you could be assuring he 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 he 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 he 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 couldn't assure you couldn't assure he couldn't assure we couldn't assure you couldn't assure they couldn't assure	I couldn't be assuring you couldn't be assuring he couldn't be assuring we couldn't be assuring you couldn't be assuring they couldn't be assuring
Perfect	V-ing perfect
I couldn't have assured you couldn't have assured he couldn't have assured we couldn't have assured you couldn't have assured they couldn't have assured	I couldn't have been assuring you couldn't have been assuring he couldn't have been assuring we couldn't have been assuring you couldn't have been assuring they couldn't have been assuring

Interrogative form

Simple form	V-ing form
could I assure? could you assure? could he assure? could we assure? could you assure? could they assure?	could I be assuring? could you be assuring? could he 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 he 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 he 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
couldn't I assure? couldn't you assure? couldn't he assure? couldn't we assure? couldn't you assure? couldn't they assure?	couldn't I be assuring? couldn't you be assuring? couldn't he be assuring? couldn't we be assuring? couldn't you be assuring? couldn't they be assuring?
Perfect	V-ing perfect
couldn't I have assured? couldn't you have assured? couldn't he have assured? couldn't we have assured? couldn't you have assured? couldn't they have assured?	couldn't I have been assuring? couldn't you have been assuring? couldn't he have been assuring? couldn't we have been assuring? couldn't you have been assuring? couldn't they have been assuring?