must earn
Verbo regular: earn - earned- earned

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must earn
you must earn
he must earn
we must earn
you must earn
they must earn 	I must be earning
you must be earning
he must be earning
we must be earning
you must be earning
they must be earning	I must have earned
you must have earned
he must have earned
we must have earned
you must have earned
they must have earned	I must have been earning
you must have been earning
he must have been earning
we must have been earning
you must have been earning
they must have been earning	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must not earn
you must not earn
he must not earn
we must not earn
you must not earn
they must not earn 	I must not be earning
you must not be earning
he must not be earning
we must not be earning
you must not be earning
they must not be earning	I must not have earned
you must not have earned
he must not have earned
we must not have earned
you must not have earned
they must not have earned	I must not have been earning
you must not have been earning
he must not have been earning
we must not have been earning
you must not have been earning
they must not have been earning	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I earn?
must you earn?
must he earn?
must we earn?
must you earn?
must they earn? 	must I be earning?
must you be earning?
must he be earning?
must we be earning?
must you be earning?
must they be earning? 	must I have earned?
must you have earned?
must he have earned?
must we have earned?
must you have earned?
must they have earned? 	must I have been earning?
must you have been earning?
must he have been earning?
must we have been earning?
must you have been earning?
must they have been earning? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I not earn?
must you not earn?
must he not earn?
must we not earn?
must you not earn?
must they not earn? 	must I not be earning?
must you not be earning?
must he not be earning?
must we not be earning?
must you not be earning?
must they not be earning? 	must I not have earned?
must you not have earned?
must he not have earned?
must we not have earned?
must you not have earned?
must they not have earned? 	must I not have been earning?
must you not have been earning?
must he not have been earning?
must we not have been earning?
must you not have been earning?
must they not have been earning?