English verb conjugation
COULD ENSURE

Regular verb: ensure - ensured - ensured

Affirmation

Simple form	V-ing form
I could ensure you could ensure she could ensure we could ensure you could ensure they could ensure	I could be ensuring you could be ensuring she could be ensuring we could be ensuring you could be ensuring they could be ensuring
Perfect	V-ing perfect
I could have ensured you could have ensured she could have ensured we could have ensured you could have ensured they could have ensured	I could have been ensuring you could have been ensuring she could have been ensuring we could have been ensuring you could have been ensuring they could have been ensuring

Negation

Simple form	V-ing form
I couldn't ensure you couldn't ensure she couldn't ensure we couldn't ensure you couldn't ensure they couldn't ensure	I couldn't be ensuring you couldn't be ensuring she couldn't be ensuring we couldn't be ensuring you couldn't be ensuring they couldn't be ensuring
Perfect	V-ing perfect
I couldn't have ensured you couldn't have ensured she couldn't have ensured we couldn't have ensured you couldn't have ensured they couldn't have ensured	I couldn't have been ensuring you couldn't have been ensuring she couldn't have been ensuring we couldn't have been ensuring you couldn't have been ensuring they couldn't have been ensuring

Interrogative form

Simple form	V-ing form
could I ensure? could you ensure? could she ensure? could we ensure? could you ensure? could they ensure?	could I be ensuring? could you be ensuring? could she be ensuring? could we be ensuring? could you be ensuring? could they be ensuring?
Perfect	V-ing perfect
could I have ensured? could you have ensured? could she have ensured? could we have ensured? could you have ensured? could they have ensured?	could I have been ensuring? could you have been ensuring? could she have been ensuring? could we have been ensuring? could you have been ensuring? could they have been ensuring?

Interro-negative form

Simple form	V-ing form
couldn't I ensure? couldn't you ensure? couldn't she ensure? couldn't we ensure? couldn't you ensure? couldn't they ensure?	couldn't I be ensuring? couldn't you be ensuring? couldn't she be ensuring? couldn't we be ensuring? couldn't you be ensuring? couldn't they be ensuring?
Perfect	V-ing perfect
couldn't I have ensured? couldn't you have ensured? couldn't she have ensured? couldn't we have ensured? couldn't you have ensured? couldn't they have ensured?	couldn't I have been ensuring? couldn't you have been ensuring? couldn't she have been ensuring? couldn't we have been ensuring? couldn't you have been ensuring? couldn't they have been ensuring?