must caucus
Verbe régulier : caucus - caucused- caucused

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must caucus
you must caucus
he must caucus
we must caucus
you must caucus
they must caucus 	I must be caucusing
you must be caucusing
he must be caucusing
we must be caucusing
you must be caucusing
they must be caucusing	I must have caucused
you must have caucused
he must have caucused
we must have caucused
you must have caucused
they must have caucused	I must have been caucusing
you must have been caucusing
he must have been caucusing
we must have been caucusing
you must have been caucusing
they must have been caucusing	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I mustn't caucus
you mustn't caucus
he mustn't caucus
we mustn't caucus
you mustn't caucus
they mustn't caucus 	I mustn't be caucusing
you mustn't be caucusing
he mustn't be caucusing
we mustn't be caucusing
you mustn't be caucusing
they mustn't be caucusing	I mustn't have caucused
you mustn't have caucused
he mustn't have caucused
we mustn't have caucused
you mustn't have caucused
they mustn't have caucused	I mustn't have been caucusing
you mustn't have been caucusing
he mustn't have been caucusing
we mustn't have been caucusing
you mustn't have been caucusing
they mustn't have been caucusing	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I caucus?
must you caucus?
must he caucus?
must we caucus?
must you caucus?
must they caucus? 	must I be caucusing?
must you be caucusing?
must he be caucusing?
must we be caucusing?
must you be caucusing?
must they be caucusing? 	must I have caucused?
must you have caucused?
must he have caucused?
must we have caucused?
must you have caucused?
must they have caucused? 	must I have been caucusing?
must you have been caucusing?
must he have been caucusing?
must we have been caucusing?
must you have been caucusing?
must they have been caucusing? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
mustn't I caucus?
mustn't you caucus?
mustn't he caucus?
mustn't we caucus?
mustn't you caucus?
mustn't they caucus? 	mustn't I be caucusing?
mustn't you be caucusing?
mustn't he be caucusing?
mustn't we be caucusing?
mustn't you be caucusing?
mustn't they be caucusing? 	mustn't I have caucused?
mustn't you have caucused?
mustn't he have caucused?
mustn't we have caucused?
mustn't you have caucused?
mustn't they have caucused? 	mustn't I have been caucusing?
mustn't you have been caucusing?
mustn't he have been caucusing?
mustn't we have been caucusing?
mustn't you have been caucusing?
mustn't they have been caucusing?