I must auction you must auction she must auction we must auction you must auction they must auction
V-ing form
I must be auctioning you must be auctioning she must be auctioning we must be auctioning you must be auctioning they must be auctioning
Perfect
I must have auctioned you must have auctioned she must have auctioned we must have auctioned you must have auctioned they must have auctioned
V-ing perfect
I must have been auctioning you must have been auctioning she must have been auctioning we must have been auctioning you must have been auctioning they must have been auctioning
Negation
Simple form
I mustn't auction you mustn't auction she mustn't auction we mustn't auction you mustn't auction they mustn't auction
V-ing form
I mustn't be auctioning you mustn't be auctioning she mustn't be auctioning we mustn't be auctioning you mustn't be auctioning they mustn't be auctioning
Perfect
I mustn't have auctioned you mustn't have auctioned she mustn't have auctioned we mustn't have auctioned you mustn't have auctioned they mustn't have auctioned
V-ing perfect
I mustn't have been auctioning you mustn't have been auctioning she mustn't have been auctioning we mustn't have been auctioning you mustn't have been auctioning they mustn't have been auctioning
Interrogative form
Simple form
must I auction? must you auction? must she auction? must we auction? must you auction? must they auction?
V-ing form
must I be auctioning? must you be auctioning? must she be auctioning? must we be auctioning? must you be auctioning? must they be auctioning?
Perfect
must I have auctioned? must you have auctioned? must she have auctioned? must we have auctioned? must you have auctioned? must they have auctioned?
V-ing perfect
must I have been auctioning? must you have been auctioning? must she have been auctioning? must we have been auctioning? must you have been auctioning? must they have been auctioning?
Interro-negative form
Simple form
mustn't I auction? mustn't you auction? mustn't she auction? mustn't we auction? mustn't you auction? mustn't they auction?
V-ing form
mustn't I be auctioning? mustn't you be auctioning? mustn't she be auctioning? mustn't we be auctioning? mustn't you be auctioning? mustn't they be auctioning?
Perfect
mustn't I have auctioned? mustn't you have auctioned? mustn't she have auctioned? mustn't we have auctioned? mustn't you have auctioned? mustn't they have auctioned?
V-ing perfect
mustn't I have been auctioning? mustn't you have been auctioning? mustn't she have been auctioning? mustn't we have been auctioning? mustn't you have been auctioning? mustn't they have been auctioning?