must fill
Verbo regular: fill - filled- filled

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must fill
you must fill
she must fill
we must fill
you must fill
they must fill 	I must be filling
you must be filling
she must be filling
we must be filling
you must be filling
they must be filling	I must have filled
you must have filled
she must have filled
we must have filled
you must have filled
they must have filled	I must have been filling
you must have been filling
she must have been filling
we must have been filling
you must have been filling
they must have been filling	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must not fill
you must not fill
she must not fill
we must not fill
you must not fill
they must not fill 	I must not be filling
you must not be filling
she must not be filling
we must not be filling
you must not be filling
they must not be filling	I must not have filled
you must not have filled
she must not have filled
we must not have filled
you must not have filled
they must not have filled	I must not have been filling
you must not have been filling
she must not have been filling
we must not have been filling
you must not have been filling
they must not have been filling	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I fill?
must you fill?
must she fill?
must we fill?
must you fill?
must they fill? 	must I be filling?
must you be filling?
must she be filling?
must we be filling?
must you be filling?
must they be filling? 	must I have filled?
must you have filled?
must she have filled?
must we have filled?
must you have filled?
must they have filled? 	must I have been filling?
must you have been filling?
must she have been filling?
must we have been filling?
must you have been filling?
must they have been filling? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I not fill?
must you not fill?
must she not fill?
must we not fill?
must you not fill?
must they not fill? 	must I not be filling?
must you not be filling?
must she not be filling?
must we not be filling?
must you not be filling?
must they not be filling? 	must I not have filled?
must you not have filled?
must she not have filled?
must we not have filled?
must you not have filled?
must they not have filled? 	must I not have been filling?
must you not have been filling?
must she not have been filling?
must we not have been filling?
must you not have been filling?
must they not have been filling?