must enforce
Verbo regular: enforce - enforced- enforced

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must enforce
you must enforce
he must enforce
we must enforce
you must enforce
they must enforce 	I must be enforcing
you must be enforcing
he must be enforcing
we must be enforcing
you must be enforcing
they must be enforcing	I must have enforced
you must have enforced
he must have enforced
we must have enforced
you must have enforced
they must have enforced	I must have been enforcing
you must have been enforcing
he must have been enforcing
we must have been enforcing
you must have been enforcing
they must have been enforcing	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must not enforce
you must not enforce
he must not enforce
we must not enforce
you must not enforce
they must not enforce 	I must not be enforcing
you must not be enforcing
he must not be enforcing
we must not be enforcing
you must not be enforcing
they must not be enforcing	I must not have enforced
you must not have enforced
he must not have enforced
we must not have enforced
you must not have enforced
they must not have enforced	I must not have been enforcing
you must not have been enforcing
he must not have been enforcing
we must not have been enforcing
you must not have been enforcing
they must not have been enforcing	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I enforce?
must you enforce?
must he enforce?
must we enforce?
must you enforce?
must they enforce? 	must I be enforcing?
must you be enforcing?
must he be enforcing?
must we be enforcing?
must you be enforcing?
must they be enforcing? 	must I have enforced?
must you have enforced?
must he have enforced?
must we have enforced?
must you have enforced?
must they have enforced? 	must I have been enforcing?
must you have been enforcing?
must he have been enforcing?
must we have been enforcing?
must you have been enforcing?
must they have been enforcing? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I not enforce?
must you not enforce?
must he not enforce?
must we not enforce?
must you not enforce?
must they not enforce? 	must I not be enforcing?
must you not be enforcing?
must he not be enforcing?
must we not be enforcing?
must you not be enforcing?
must they not be enforcing? 	must I not have enforced?
must you not have enforced?
must he not have enforced?
must we not have enforced?
must you not have enforced?
must they not have enforced? 	must I not have been enforcing?
must you not have been enforcing?
must he not have been enforcing?
must we not have been enforcing?
must you not have been enforcing?
must they not have been enforcing?