must unable
Verbo regular: unable - unabled- unabled

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must unable
you must unable
she must unable
we must unable
you must unable
they must unable 	I must be unabling
you must be unabling
she must be unabling
we must be unabling
you must be unabling
they must be unabling	I must have unabled
you must have unabled
she must have unabled
we must have unabled
you must have unabled
they must have unabled	I must have been unabling
you must have been unabling
she must have been unabling
we must have been unabling
you must have been unabling
they must have been unabling	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I mustn't unable
you mustn't unable
she mustn't unable
we mustn't unable
you mustn't unable
they mustn't unable 	I mustn't be unabling
you mustn't be unabling
she mustn't be unabling
we mustn't be unabling
you mustn't be unabling
they mustn't be unabling	I mustn't have unabled
you mustn't have unabled
she mustn't have unabled
we mustn't have unabled
you mustn't have unabled
they mustn't have unabled	I mustn't have been unabling
you mustn't have been unabling
she mustn't have been unabling
we mustn't have been unabling
you mustn't have been unabling
they mustn't have been unabling	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I unable?
must you unable?
must she unable?
must we unable?
must you unable?
must they unable? 	must I be unabling?
must you be unabling?
must she be unabling?
must we be unabling?
must you be unabling?
must they be unabling? 	must I have unabled?
must you have unabled?
must she have unabled?
must we have unabled?
must you have unabled?
must they have unabled? 	must I have been unabling?
must you have been unabling?
must she have been unabling?
must we have been unabling?
must you have been unabling?
must they have been unabling? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
mustn't I unable?
mustn't you unable?
mustn't she unable?
mustn't we unable?
mustn't you unable?
mustn't they unable? 	mustn't I be unabling?
mustn't you be unabling?
mustn't she be unabling?
mustn't we be unabling?
mustn't you be unabling?
mustn't they be unabling? 	mustn't I have unabled?
mustn't you have unabled?
mustn't she have unabled?
mustn't we have unabled?
mustn't you have unabled?
mustn't they have unabled? 	mustn't I have been unabling?
mustn't you have been unabling?
mustn't she have been unabling?
mustn't we have been unabling?
mustn't you have been unabling?
mustn't they have been unabling?