must gab
Verbo regular: gab - gabbed- gabbed

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must gab
you must gab
she must gab
we must gab
you must gab
they must gab 	I must be gabbing
you must be gabbing
she must be gabbing
we must be gabbing
you must be gabbing
they must be gabbing	I must have gabbed
you must have gabbed
she must have gabbed
we must have gabbed
you must have gabbed
they must have gabbed	I must have been gabbing
you must have been gabbing
she must have been gabbing
we must have been gabbing
you must have been gabbing
they must have been gabbing	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I mustn't gab
you mustn't gab
she mustn't gab
we mustn't gab
you mustn't gab
they mustn't gab 	I mustn't be gabbing
you mustn't be gabbing
she mustn't be gabbing
we mustn't be gabbing
you mustn't be gabbing
they mustn't be gabbing	I mustn't have gabbed
you mustn't have gabbed
she mustn't have gabbed
we mustn't have gabbed
you mustn't have gabbed
they mustn't have gabbed	I mustn't have been gabbing
you mustn't have been gabbing
she mustn't have been gabbing
we mustn't have been gabbing
you mustn't have been gabbing
they mustn't have been gabbing	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I gab?
must you gab?
must she gab?
must we gab?
must you gab?
must they gab? 	must I be gabbing?
must you be gabbing?
must she be gabbing?
must we be gabbing?
must you be gabbing?
must they be gabbing? 	must I have gabbed?
must you have gabbed?
must she have gabbed?
must we have gabbed?
must you have gabbed?
must they have gabbed? 	must I have been gabbing?
must you have been gabbing?
must she have been gabbing?
must we have been gabbing?
must you have been gabbing?
must they have been gabbing? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
mustn't I gab?
mustn't you gab?
mustn't she gab?
mustn't we gab?
mustn't you gab?
mustn't they gab? 	mustn't I be gabbing?
mustn't you be gabbing?
mustn't she be gabbing?
mustn't we be gabbing?
mustn't you be gabbing?
mustn't they be gabbing? 	mustn't I have gabbed?
mustn't you have gabbed?
mustn't she have gabbed?
mustn't we have gabbed?
mustn't you have gabbed?
mustn't they have gabbed? 	mustn't I have been gabbing?
mustn't you have been gabbing?
mustn't she have been gabbing?
mustn't we have been gabbing?
mustn't you have been gabbing?
mustn't they have been gabbing?