English verb conjugation
COULD CONVINCE

Regular verb: convince - convinced - convinced

Affirmation

Simple form	V-ing form
I could convince you could convince she could convince we could convince you could convince they could convince	I could be convincing you could be convincing she could be convincing we could be convincing you could be convincing they could be convincing
Perfect	V-ing perfect
I could have convinced you could have convinced she could have convinced we could have convinced you could have convinced they could have convinced	I could have been convincing you could have been convincing she could have been convincing we could have been convincing you could have been convincing they could have been convincing

Negation

Simple form	V-ing form
I could not convince you could not convince she could not convince we could not convince you could not convince they could not convince	I could not be convincing you could not be convincing she could not be convincing we could not be convincing you could not be convincing they could not be convincing
Perfect	V-ing perfect
I could not have convinced you could not have convinced she could not have convinced we could not have convinced you could not have convinced they could not have convinced	I could not have been convincing you could not have been convincing she could not have been convincing we could not have been convincing you could not have been convincing they could not have been convincing

Interrogative form

Simple form	V-ing form
could I convince? could you convince? could she convince? could we convince? could you convince? could they convince?	could I be convincing? could you be convincing? could she be convincing? could we be convincing? could you be convincing? could they be convincing?
Perfect	V-ing perfect
could I have convinced? could you have convinced? could she have convinced? could we have convinced? could you have convinced? could they have convinced?	could I have been convincing? could you have been convincing? could she have been convincing? could we have been convincing? could you have been convincing? could they have been convincing?

Interro-negative form

Simple form	V-ing form
could I not convince? could you not convince? could she not convince? could we not convince? could you not convince? could they not convince?	could I not be convincing? could you not be convincing? could she not be convincing? could we not be convincing? could you not be convincing? could they not be convincing?
Perfect	V-ing perfect
could I not have convinced? could you not have convinced? could she not have convinced? could we not have convinced? could you not have convinced? could they not have convinced?	could I not have been convincing? could you not have been convincing? could she not have been convincing? could we not have been convincing? could you not have been convincing? could they not have been convincing?