must imprison
Verbo regular: imprison - imprisoned- imprisoned

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must imprison
you must imprison
he must imprison
we must imprison
you must imprison
they must imprison 	I must be imprisoning
you must be imprisoning
he must be imprisoning
we must be imprisoning
you must be imprisoning
they must be imprisoning	I must have imprisoned
you must have imprisoned
he must have imprisoned
we must have imprisoned
you must have imprisoned
they must have imprisoned	I must have been imprisoning
you must have been imprisoning
he must have been imprisoning
we must have been imprisoning
you must have been imprisoning
they must have been imprisoning	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must not imprison
you must not imprison
he must not imprison
we must not imprison
you must not imprison
they must not imprison 	I must not be imprisoning
you must not be imprisoning
he must not be imprisoning
we must not be imprisoning
you must not be imprisoning
they must not be imprisoning	I must not have imprisoned
you must not have imprisoned
he must not have imprisoned
we must not have imprisoned
you must not have imprisoned
they must not have imprisoned	I must not have been imprisoning
you must not have been imprisoning
he must not have been imprisoning
we must not have been imprisoning
you must not have been imprisoning
they must not have been imprisoning	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I imprison?
must you imprison?
must he imprison?
must we imprison?
must you imprison?
must they imprison? 	must I be imprisoning?
must you be imprisoning?
must he be imprisoning?
must we be imprisoning?
must you be imprisoning?
must they be imprisoning? 	must I have imprisoned?
must you have imprisoned?
must he have imprisoned?
must we have imprisoned?
must you have imprisoned?
must they have imprisoned? 	must I have been imprisoning?
must you have been imprisoning?
must he have been imprisoning?
must we have been imprisoning?
must you have been imprisoning?
must they have been imprisoning? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I not imprison?
must you not imprison?
must he not imprison?
must we not imprison?
must you not imprison?
must they not imprison? 	must I not be imprisoning?
must you not be imprisoning?
must he not be imprisoning?
must we not be imprisoning?
must you not be imprisoning?
must they not be imprisoning? 	must I not have imprisoned?
must you not have imprisoned?
must he not have imprisoned?
must we not have imprisoned?
must you not have imprisoned?
must they not have imprisoned? 	must I not have been imprisoning?
must you not have been imprisoning?
must he not have been imprisoning?
must we not have been imprisoning?
must you not have been imprisoning?
must they not have been imprisoning?