English verb conjugation
MUST SUMMERSAULT

Regular verb: summersault - summersaulted - summersaulted

Affirmation

Simple form	V-ing form
I must summersault you must summersault he must summersault we must summersault you must summersault they must summersault	I must be summersaulting you must be summersaulting he must be summersaulting we must be summersaulting you must be summersaulting they must be summersaulting
Perfect	V-ing perfect
I must have summersaulted you must have summersaulted he must have summersaulted we must have summersaulted you must have summersaulted they must have summersaulted	I must have been summersaulting you must have been summersaulting he must have been summersaulting we must have been summersaulting you must have been summersaulting they must have been summersaulting

Negation

Simple form	V-ing form
I mustn't summersault you mustn't summersault he mustn't summersault we mustn't summersault you mustn't summersault they mustn't summersault	I mustn't be summersaulting you mustn't be summersaulting he mustn't be summersaulting we mustn't be summersaulting you mustn't be summersaulting they mustn't be summersaulting
Perfect	V-ing perfect
I mustn't have summersaulted you mustn't have summersaulted he mustn't have summersaulted we mustn't have summersaulted you mustn't have summersaulted they mustn't have summersaulted	I mustn't have been summersaulting you mustn't have been summersaulting he mustn't have been summersaulting we mustn't have been summersaulting you mustn't have been summersaulting they mustn't have been summersaulting

Interrogative form

Simple form	V-ing form
must I summersault? must you summersault? must he summersault? must we summersault? must you summersault? must they summersault?	must I be summersaulting? must you be summersaulting? must he be summersaulting? must we be summersaulting? must you be summersaulting? must they be summersaulting?
Perfect	V-ing perfect
must I have summersaulted? must you have summersaulted? must he have summersaulted? must we have summersaulted? must you have summersaulted? must they have summersaulted?	must I have been summersaulting? must you have been summersaulting? must he have been summersaulting? must we have been summersaulting? must you have been summersaulting? must they have been summersaulting?

Interro-negative form

Simple form	V-ing form
mustn't I summersault? mustn't you summersault? mustn't he summersault? mustn't we summersault? mustn't you summersault? mustn't they summersault?	mustn't I be summersaulting? mustn't you be summersaulting? mustn't he be summersaulting? mustn't we be summersaulting? mustn't you be summersaulting? mustn't they be summersaulting?
Perfect	V-ing perfect
mustn't I have summersaulted? mustn't you have summersaulted? mustn't he have summersaulted? mustn't we have summersaulted? mustn't you have summersaulted? mustn't they have summersaulted?	mustn't I have been summersaulting? mustn't you have been summersaulting? mustn't he have been summersaulting? mustn't we have been summersaulting? mustn't you have been summersaulting? mustn't they have been summersaulting?