English verb conjugation
COULD CIRCUMSTANTIATE

Regular verb: circumstantiate - circumstantiated - circumstantiated

Affirmation

Simple form	V-ing form
I could circumstantiate you could circumstantiate she could circumstantiate we could circumstantiate you could circumstantiate they could circumstantiate	I could be circumstantiating you could be circumstantiating she could be circumstantiating we could be circumstantiating you could be circumstantiating they could be circumstantiating
Perfect	V-ing perfect
I could have circumstantiated you could have circumstantiated she could have circumstantiated we could have circumstantiated you could have circumstantiated they could have circumstantiated	I could have been circumstantiating you could have been circumstantiating she could have been circumstantiating we could have been circumstantiating you could have been circumstantiating they could have been circumstantiating

Negation

Simple form	V-ing form
I couldn't circumstantiate you couldn't circumstantiate she couldn't circumstantiate we couldn't circumstantiate you couldn't circumstantiate they couldn't circumstantiate	I couldn't be circumstantiating you couldn't be circumstantiating she couldn't be circumstantiating we couldn't be circumstantiating you couldn't be circumstantiating they couldn't be circumstantiating
Perfect	V-ing perfect
I couldn't have circumstantiated you couldn't have circumstantiated she couldn't have circumstantiated we couldn't have circumstantiated you couldn't have circumstantiated they couldn't have circumstantiated	I couldn't have been circumstantiating you couldn't have been circumstantiating she couldn't have been circumstantiating we couldn't have been circumstantiating you couldn't have been circumstantiating they couldn't have been circumstantiating

Interrogative form

Simple form	V-ing form
could I circumstantiate? could you circumstantiate? could she circumstantiate? could we circumstantiate? could you circumstantiate? could they circumstantiate?	could I be circumstantiating? could you be circumstantiating? could she be circumstantiating? could we be circumstantiating? could you be circumstantiating? could they be circumstantiating?
Perfect	V-ing perfect
could I have circumstantiated? could you have circumstantiated? could she have circumstantiated? could we have circumstantiated? could you have circumstantiated? could they have circumstantiated?	could I have been circumstantiating? could you have been circumstantiating? could she have been circumstantiating? could we have been circumstantiating? could you have been circumstantiating? could they have been circumstantiating?

Interro-negative form

Simple form	V-ing form
couldn't I circumstantiate? couldn't you circumstantiate? couldn't she circumstantiate? couldn't we circumstantiate? couldn't you circumstantiate? couldn't they circumstantiate?	couldn't I be circumstantiating? couldn't you be circumstantiating? couldn't she be circumstantiating? couldn't we be circumstantiating? couldn't you be circumstantiating? couldn't they be circumstantiating?
Perfect	V-ing perfect
couldn't I have circumstantiated? couldn't you have circumstantiated? couldn't she have circumstantiated? couldn't we have circumstantiated? couldn't you have circumstantiated? couldn't they have circumstantiated?	couldn't I have been circumstantiating? couldn't you have been circumstantiating? couldn't she have been circumstantiating? couldn't we have been circumstantiating? couldn't you have been circumstantiating? couldn't they have been circumstantiating?