must defend
Verbo regular: defend - defended- defended

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
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	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	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I mustn't defend
you mustn't defend
he mustn't defend
we mustn't defend
you mustn't defend
they mustn't defend 	I mustn't be defending
you mustn't be defending
he mustn't be defending
we mustn't be defending
you mustn't be defending
they mustn't be defending	I mustn't have defended
you mustn't have defended
he mustn't have defended
we mustn't have defended
you mustn't have defended
they mustn't have defended	I mustn't have been defending
you mustn't have been defending
he mustn't have been defending
we mustn't have been defending
you mustn't have been defending
they mustn't have been defending	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
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? 	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? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
mustn't I defend?
mustn't you defend?
mustn't he defend?
mustn't we defend?
mustn't you defend?
mustn't they defend? 	mustn't I be defending?
mustn't you be defending?
mustn't he be defending?
mustn't we be defending?
mustn't you be defending?
mustn't they be defending? 	mustn't I have defended?
mustn't you have defended?
mustn't he have defended?
mustn't we have defended?
mustn't you have defended?
mustn't they have defended? 	mustn't I have been defending?
mustn't you have been defending?
mustn't he have been defending?
mustn't we have been defending?
mustn't you have been defending?
mustn't they have been defending?