must chatter
Verbo regular: chatter - chattered- chattered

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con 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	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must not chatter
you must not chatter
he must not chatter
we must not chatter
you must not chatter
they must not chatter 	I must not be chattering
you must not be chattering
he must not be chattering
we must not be chattering
you must not be chattering
they must not be chattering	I must not have chattered
you must not have chattered
he must not have chattered
we must not have chattered
you must not have chattered
they must not have chattered	I must not have been chattering
you must not have been chattering
he must not have been chattering
we must not have been chattering
you must not have been chattering
they must not have been chattering	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con 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-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I not chatter?
must you not chatter?
must he not chatter?
must we not chatter?
must you not chatter?
must they not chatter? 	must I not be chattering?
must you not be chattering?
must he not be chattering?
must we not be chattering?
must you not be chattering?
must they not be chattering? 	must I not have chattered?
must you not have chattered?
must he not have chattered?
must we not have chattered?
must you not have chattered?
must they not have chattered? 	must I not have been chattering?
must you not have been chattering?
must he not have been chattering?
must we not have been chattering?
must you not have been chattering?
must they not have been chattering?