English verb conjugation
COULD DEFEND

Regular verb: defend - defended - defended

Affirmation

Simple form	V-ing form
I could defend you could defend she could defend we could defend you could defend they could defend	I could be defending you could be defending she could be defending we could be defending you could be defending they could be defending
Perfect	V-ing perfect
I could have defended you could have defended she could have defended we could have defended you could have defended they could have defended	I could have been defending you could have been defending she could have been defending we could have been defending you could have been defending they could have been defending

Negation

Simple form	V-ing form
I could not defend you could not defend she could not defend we could not defend you could not defend they could not defend	I could not be defending you could not be defending she could not be defending we could not be defending you could not be defending they could not be defending
Perfect	V-ing perfect
I could not have defended you could not have defended she could not have defended we could not have defended you could not have defended they could not have defended	I could not have been defending you could not have been defending she could not have been defending we could not have been defending you could not have been defending they could not have been defending

Interrogative form

Simple form	V-ing form
could I defend? could you defend? could she defend? could we defend? could you defend? could they defend?	could I be defending? could you be defending? could she be defending? could we be defending? could you be defending? could they be defending?
Perfect	V-ing perfect
could I have defended? could you have defended? could she have defended? could we have defended? could you have defended? could they have defended?	could I have been defending? could you have been defending? could she have been defending? could we have been defending? could you have been defending? could they have been defending?

Interro-negative form

Simple form	V-ing form
could I not defend? could you not defend? could she not defend? could we not defend? could you not defend? could they not defend?	could I not be defending? could you not be defending? could she not be defending? could we not be defending? could you not be defending? could they not be defending?
Perfect	V-ing perfect
could I not have defended? could you not have defended? could she not have defended? could we not have defended? could you not have defended? could they not have defended?	could I not have been defending? could you not have been defending? could she not have been defending? could we not have been defending? could you not have been defending? could they not have been defending?