English verb conjugation
COULD AVER

Regular verb: aver - averred - averred

Affirmation

Simple form	V-ing form
I could aver you could aver she could aver we could aver you could aver they could aver	I could be averring you could be averring she could be averring we could be averring you could be averring they could be averring
Perfect	V-ing perfect
I could have averred you could have averred she could have averred we could have averred you could have averred they could have averred	I could have been averring you could have been averring she could have been averring we could have been averring you could have been averring they could have been averring

Negation

Simple form	V-ing form
I could not aver you could not aver she could not aver we could not aver you could not aver they could not aver	I could not be averring you could not be averring she could not be averring we could not be averring you could not be averring they could not be averring
Perfect	V-ing perfect
I could not have averred you could not have averred she could not have averred we could not have averred you could not have averred they could not have averred	I could not have been averring you could not have been averring she could not have been averring we could not have been averring you could not have been averring they could not have been averring

Interrogative form

Simple form	V-ing form
could I aver? could you aver? could she aver? could we aver? could you aver? could they aver?	could I be averring? could you be averring? could she be averring? could we be averring? could you be averring? could they be averring?
Perfect	V-ing perfect
could I have averred? could you have averred? could she have averred? could we have averred? could you have averred? could they have averred?	could I have been averring? could you have been averring? could she have been averring? could we have been averring? could you have been averring? could they have been averring?

Interro-negative form

Simple form	V-ing form
could I not aver? could you not aver? could she not aver? could we not aver? could you not aver? could they not aver?	could I not be averring? could you not be averring? could she not be averring? could we not be averring? could you not be averring? could they not be averring?
Perfect	V-ing perfect
could I not have averred? could you not have averred? could she not have averred? could we not have averred? could you not have averred? could they not have averred?	could I not have been averring? could you not have been averring? could she not have been averring? could we not have been averring? could you not have been averring? could they not have been averring?