English verb conjugation
MUST DEFEND

Regular verb: defend - defended - defended

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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