must defend
Regular verb: defend - defended- defended

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