must chatter
Verbo regular: chatter - chattered- chattered

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must chatter
you must chatter
he must chatter
we must chatter
you must chatter
they must chatter 	I must be chattering
you must be chattering
he must be chattering
we must be chattering
you must be chattering
they must be chattering	I must have chattered
you must have chattered
he must have chattered
we must have chattered
you must have chattered
they must have chattered	I must have been chattering
you must have been chattering
he must have been chattering
we must have been chattering
you must have been chattering
they must have been chattering	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I mustn't chatter
you mustn't chatter
he mustn't chatter
we mustn't chatter
you mustn't chatter
they mustn't chatter 	I mustn't be chattering
you mustn't be chattering
he mustn't be chattering
we mustn't be chattering
you mustn't be chattering
they mustn't be chattering	I mustn't have chattered
you mustn't have chattered
he mustn't have chattered
we mustn't have chattered
you mustn't have chattered
they mustn't have chattered	I mustn't have been chattering
you mustn't have been chattering
he mustn't have been chattering
we mustn't have been chattering
you mustn't have been chattering
they mustn't have been chattering	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I chatter?
must you chatter?
must he chatter?
must we chatter?
must you chatter?
must they chatter? 	must I be chattering?
must you be chattering?
must he be chattering?
must we be chattering?
must you be chattering?
must they be chattering? 	must I have chattered?
must you have chattered?
must he have chattered?
must we have chattered?
must you have chattered?
must they have chattered? 	must I have been chattering?
must you have been chattering?
must he have been chattering?
must we have been chattering?
must you have been chattering?
must they have been chattering? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
mustn't I chatter?
mustn't you chatter?
mustn't he chatter?
mustn't we chatter?
mustn't you chatter?
mustn't they chatter? 	mustn't I be chattering?
mustn't you be chattering?
mustn't he be chattering?
mustn't we be chattering?
mustn't you be chattering?
mustn't they be chattering? 	mustn't I have chattered?
mustn't you have chattered?
mustn't he have chattered?
mustn't we have chattered?
mustn't you have chattered?
mustn't they have chattered? 	mustn't I have been chattering?
mustn't you have been chattering?
mustn't he have been chattering?
mustn't we have been chattering?
mustn't you have been chattering?
mustn't they have been chattering?