must learn
Verbo irregular: learn - learned, learnt- learned, learnt

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must learn
you must learn
he must learn
we must learn
you must learn
they must learn 	I must be learning
you must be learning
he must be learning
we must be learning
you must be learning
they must be learning	I must have learned, learnt
you must have learned, learnt
he must have learned, learnt
we must have learned, learnt
you must have learned, learnt
they must have learned, learnt	I must have been learning
you must have been learning
he must have been learning
we must have been learning
you must have been learning
they must have been learning	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must not learn
you must not learn
he must not learn
we must not learn
you must not learn
they must not learn 	I must not be learning
you must not be learning
he must not be learning
we must not be learning
you must not be learning
they must not be learning	I must not have learned, learnt
you must not have learned, learnt
he must not have learned, learnt
we must not have learned, learnt
you must not have learned, learnt
they must not have learned, learnt	I must not have been learning
you must not have been learning
he must not have been learning
we must not have been learning
you must not have been learning
they must not have been learning	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I learn?
must you learn?
must he learn?
must we learn?
must you learn?
must they learn? 	must I be learning?
must you be learning?
must he be learning?
must we be learning?
must you be learning?
must they be learning? 	must I have learned, learnt?
must you have learned, learnt?
must he have learned, learnt?
must we have learned, learnt?
must you have learned, learnt?
must they have learned, learnt? 	must I have been learning?
must you have been learning?
must he have been learning?
must we have been learning?
must you have been learning?
must they have been learning? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I not learn?
must you not learn?
must he not learn?
must we not learn?
must you not learn?
must they not learn? 	must I not be learning?
must you not be learning?
must he not be learning?
must we not be learning?
must you not be learning?
must they not be learning? 	must I not have learned, learnt?
must you not have learned, learnt?
must he not have learned, learnt?
must we not have learned, learnt?
must you not have learned, learnt?
must they not have learned, learnt? 	must I not have been learning?
must you not have been learning?
must he not have been learning?
must we not have been learning?
must you not have been learning?
must they not have been learning?