must define
Verbo regular: define - defined- defined

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must define
you must define
he must define
we must define
you must define
they must define 	I must be defining
you must be defining
he must be defining
we must be defining
you must be defining
they must be defining	I must have defined
you must have defined
he must have defined
we must have defined
you must have defined
they must have defined	I must have been defining
you must have been defining
he must have been defining
we must have been defining
you must have been defining
they must have been defining	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must not define
you must not define
he must not define
we must not define
you must not define
they must not define 	I must not be defining
you must not be defining
he must not be defining
we must not be defining
you must not be defining
they must not be defining	I must not have defined
you must not have defined
he must not have defined
we must not have defined
you must not have defined
they must not have defined	I must not have been defining
you must not have been defining
he must not have been defining
we must not have been defining
you must not have been defining
they must not have been defining	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I define?
must you define?
must he define?
must we define?
must you define?
must they define? 	must I be defining?
must you be defining?
must he be defining?
must we be defining?
must you be defining?
must they be defining? 	must I have defined?
must you have defined?
must he have defined?
must we have defined?
must you have defined?
must they have defined? 	must I have been defining?
must you have been defining?
must he have been defining?
must we have been defining?
must you have been defining?
must they have been defining? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I not define?
must you not define?
must he not define?
must we not define?
must you not define?
must they not define? 	must I not be defining?
must you not be defining?
must he not be defining?
must we not be defining?
must you not be defining?
must they not be defining? 	must I not have defined?
must you not have defined?
must he not have defined?
must we not have defined?
must you not have defined?
must they not have defined? 	must I not have been defining?
must you not have been defining?
must he not have been defining?
must we not have been defining?
must you not have been defining?
must they not have been defining?