must ameliorate
Verbo regular: ameliorate - ameliorated- ameliorated

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must ameliorate
you must ameliorate
he must ameliorate
we must ameliorate
you must ameliorate
they must ameliorate 	I must be ameliorating
you must be ameliorating
he must be ameliorating
we must be ameliorating
you must be ameliorating
they must be ameliorating	I must have ameliorated
you must have ameliorated
he must have ameliorated
we must have ameliorated
you must have ameliorated
they must have ameliorated	I must have been ameliorating
you must have been ameliorating
he must have been ameliorating
we must have been ameliorating
you must have been ameliorating
they must have been ameliorating	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must not ameliorate
you must not ameliorate
he must not ameliorate
we must not ameliorate
you must not ameliorate
they must not ameliorate 	I must not be ameliorating
you must not be ameliorating
he must not be ameliorating
we must not be ameliorating
you must not be ameliorating
they must not be ameliorating	I must not have ameliorated
you must not have ameliorated
he must not have ameliorated
we must not have ameliorated
you must not have ameliorated
they must not have ameliorated	I must not have been ameliorating
you must not have been ameliorating
he must not have been ameliorating
we must not have been ameliorating
you must not have been ameliorating
they must not have been ameliorating	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I ameliorate?
must you ameliorate?
must he ameliorate?
must we ameliorate?
must you ameliorate?
must they ameliorate? 	must I be ameliorating?
must you be ameliorating?
must he be ameliorating?
must we be ameliorating?
must you be ameliorating?
must they be ameliorating? 	must I have ameliorated?
must you have ameliorated?
must he have ameliorated?
must we have ameliorated?
must you have ameliorated?
must they have ameliorated? 	must I have been ameliorating?
must you have been ameliorating?
must he have been ameliorating?
must we have been ameliorating?
must you have been ameliorating?
must they have been ameliorating? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I not ameliorate?
must you not ameliorate?
must he not ameliorate?
must we not ameliorate?
must you not ameliorate?
must they not ameliorate? 	must I not be ameliorating?
must you not be ameliorating?
must he not be ameliorating?
must we not be ameliorating?
must you not be ameliorating?
must they not be ameliorating? 	must I not have ameliorated?
must you not have ameliorated?
must he not have ameliorated?
must we not have ameliorated?
must you not have ameliorated?
must they not have ameliorated? 	must I not have been ameliorating?
must you not have been ameliorating?
must he not have been ameliorating?
must we not have been ameliorating?
must you not have been ameliorating?
must they not have been ameliorating?