English verb conjugation
MUST CAUCUS

Regular verb: caucus - caucused - caucused

Affirmation

Simple form	V-ing form
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
Perfect	V-ing perfect
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

Negation

Simple form	V-ing form
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
Perfect	V-ing perfect
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

Interrogative form

Simple form	V-ing form
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?
Perfect	V-ing perfect
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?

Interro-negative form

Simple form	V-ing form
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?
Perfect	V-ing perfect
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?