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
she must caucus
we must caucus
you must caucus
they must caucus 	I must be caucusing
you must be caucusing
she must be caucusing
we must be caucusing
you must be caucusing
they must be caucusing	I must have caucused
you must have caucused
she 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
she 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
she 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
she 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
she 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
she 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 she caucus?
must we caucus?
must you caucus?
must they caucus? 	must I be caucusing?
must you be caucusing?
must she be caucusing?
must we be caucusing?
must you be caucusing?
must they be caucusing? 	must I have caucused?
must you have caucused?
must she 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 she 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 she 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 she 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 she 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 she have been caucusing?
mustn't we have been caucusing?
mustn't you have been caucusing?
mustn't they have been caucusing?