English verb conjugation
MUST FLAT

Regular verb: flat - flated - flated

Affirmation

Simple form	V-ing form
I must flat you must flat she must flat we must flat you must flat they must flat	I must be flating you must be flating she must be flating we must be flating you must be flating they must be flating
Perfect	V-ing perfect
I must have flated you must have flated she must have flated we must have flated you must have flated they must have flated	I must have been flating you must have been flating she must have been flating we must have been flating you must have been flating they must have been flating

Negation

Simple form	V-ing form
I mustn't flat you mustn't flat she mustn't flat we mustn't flat you mustn't flat they mustn't flat	I mustn't be flating you mustn't be flating she mustn't be flating we mustn't be flating you mustn't be flating they mustn't be flating
Perfect	V-ing perfect
I mustn't have flated you mustn't have flated she mustn't have flated we mustn't have flated you mustn't have flated they mustn't have flated	I mustn't have been flating you mustn't have been flating she mustn't have been flating we mustn't have been flating you mustn't have been flating they mustn't have been flating

Interrogative form

Simple form	V-ing form
must I flat? must you flat? must she flat? must we flat? must you flat? must they flat?	must I be flating? must you be flating? must she be flating? must we be flating? must you be flating? must they be flating?
Perfect	V-ing perfect
must I have flated? must you have flated? must she have flated? must we have flated? must you have flated? must they have flated?	must I have been flating? must you have been flating? must she have been flating? must we have been flating? must you have been flating? must they have been flating?

Interro-negative form

Simple form	V-ing form
mustn't I flat? mustn't you flat? mustn't she flat? mustn't we flat? mustn't you flat? mustn't they flat?	mustn't I be flating? mustn't you be flating? mustn't she be flating? mustn't we be flating? mustn't you be flating? mustn't they be flating?
Perfect	V-ing perfect
mustn't I have flated? mustn't you have flated? mustn't she have flated? mustn't we have flated? mustn't you have flated? mustn't they have flated?	mustn't I have been flating? mustn't you have been flating? mustn't she have been flating? mustn't we have been flating? mustn't you have been flating? mustn't they have been flating?