English verb conjugation
MUST CUIRASS

Regular verb: cuirass - cuirassed - cuirassed

Affirmation

Simple form	V-ing form
I must cuirass you must cuirass he must cuirass we must cuirass you must cuirass they must cuirass	I must be cuirassing you must be cuirassing he must be cuirassing we must be cuirassing you must be cuirassing they must be cuirassing
Perfect	V-ing perfect
I must have cuirassed you must have cuirassed he must have cuirassed we must have cuirassed you must have cuirassed they must have cuirassed	I must have been cuirassing you must have been cuirassing he must have been cuirassing we must have been cuirassing you must have been cuirassing they must have been cuirassing

Negation

Simple form	V-ing form
I mustn't cuirass you mustn't cuirass he mustn't cuirass we mustn't cuirass you mustn't cuirass they mustn't cuirass	I mustn't be cuirassing you mustn't be cuirassing he mustn't be cuirassing we mustn't be cuirassing you mustn't be cuirassing they mustn't be cuirassing
Perfect	V-ing perfect
I mustn't have cuirassed you mustn't have cuirassed he mustn't have cuirassed we mustn't have cuirassed you mustn't have cuirassed they mustn't have cuirassed	I mustn't have been cuirassing you mustn't have been cuirassing he mustn't have been cuirassing we mustn't have been cuirassing you mustn't have been cuirassing they mustn't have been cuirassing

Interrogative form

Simple form	V-ing form
must I cuirass? must you cuirass? must he cuirass? must we cuirass? must you cuirass? must they cuirass?	must I be cuirassing? must you be cuirassing? must he be cuirassing? must we be cuirassing? must you be cuirassing? must they be cuirassing?
Perfect	V-ing perfect
must I have cuirassed? must you have cuirassed? must he have cuirassed? must we have cuirassed? must you have cuirassed? must they have cuirassed?	must I have been cuirassing? must you have been cuirassing? must he have been cuirassing? must we have been cuirassing? must you have been cuirassing? must they have been cuirassing?

Interro-negative form

Simple form	V-ing form
mustn't I cuirass? mustn't you cuirass? mustn't he cuirass? mustn't we cuirass? mustn't you cuirass? mustn't they cuirass?	mustn't I be cuirassing? mustn't you be cuirassing? mustn't he be cuirassing? mustn't we be cuirassing? mustn't you be cuirassing? mustn't they be cuirassing?
Perfect	V-ing perfect
mustn't I have cuirassed? mustn't you have cuirassed? mustn't he have cuirassed? mustn't we have cuirassed? mustn't you have cuirassed? mustn't they have cuirassed?	mustn't I have been cuirassing? mustn't you have been cuirassing? mustn't he have been cuirassing? mustn't we have been cuirassing? mustn't you have been cuirassing? mustn't they have been cuirassing?