must besiege
Verbo regular: besiege - besieged- besieged

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must besiege
you must besiege
he must besiege
we must besiege
you must besiege
they must besiege 	I must be besieging
you must be besieging
he must be besieging
we must be besieging
you must be besieging
they must be besieging	I must have besieged
you must have besieged
he must have besieged
we must have besieged
you must have besieged
they must have besieged	I must have been besieging
you must have been besieging
he must have been besieging
we must have been besieging
you must have been besieging
they must have been besieging	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must not besiege
you must not besiege
he must not besiege
we must not besiege
you must not besiege
they must not besiege 	I must not be besieging
you must not be besieging
he must not be besieging
we must not be besieging
you must not be besieging
they must not be besieging	I must not have besieged
you must not have besieged
he must not have besieged
we must not have besieged
you must not have besieged
they must not have besieged	I must not have been besieging
you must not have been besieging
he must not have been besieging
we must not have been besieging
you must not have been besieging
they must not have been besieging	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I besiege?
must you besiege?
must he besiege?
must we besiege?
must you besiege?
must they besiege? 	must I be besieging?
must you be besieging?
must he be besieging?
must we be besieging?
must you be besieging?
must they be besieging? 	must I have besieged?
must you have besieged?
must he have besieged?
must we have besieged?
must you have besieged?
must they have besieged? 	must I have been besieging?
must you have been besieging?
must he have been besieging?
must we have been besieging?
must you have been besieging?
must they have been besieging? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I not besiege?
must you not besiege?
must he not besiege?
must we not besiege?
must you not besiege?
must they not besiege? 	must I not be besieging?
must you not be besieging?
must he not be besieging?
must we not be besieging?
must you not be besieging?
must they not be besieging? 	must I not have besieged?
must you not have besieged?
must he not have besieged?
must we not have besieged?
must you not have besieged?
must they not have besieged? 	must I not have been besieging?
must you not have been besieging?
must he not have been besieging?
must we not have been besieging?
must you not have been besieging?
must they not have been besieging?