English verb conjugation
MUST SCRUMP

Regular verb: scrump - scrumped - scrumped

Affirmation

Simple form	V-ing form
I must scrump you must scrump he must scrump we must scrump you must scrump they must scrump	I must be scrumping you must be scrumping he must be scrumping we must be scrumping you must be scrumping they must be scrumping
Perfect	V-ing perfect
I must have scrumped you must have scrumped he must have scrumped we must have scrumped you must have scrumped they must have scrumped	I must have been scrumping you must have been scrumping he must have been scrumping we must have been scrumping you must have been scrumping they must have been scrumping

Negation

Simple form	V-ing form
I mustn't scrump you mustn't scrump he mustn't scrump we mustn't scrump you mustn't scrump they mustn't scrump	I mustn't be scrumping you mustn't be scrumping he mustn't be scrumping we mustn't be scrumping you mustn't be scrumping they mustn't be scrumping
Perfect	V-ing perfect
I mustn't have scrumped you mustn't have scrumped he mustn't have scrumped we mustn't have scrumped you mustn't have scrumped they mustn't have scrumped	I mustn't have been scrumping you mustn't have been scrumping he mustn't have been scrumping we mustn't have been scrumping you mustn't have been scrumping they mustn't have been scrumping

Interrogative form

Simple form	V-ing form
must I scrump? must you scrump? must he scrump? must we scrump? must you scrump? must they scrump?	must I be scrumping? must you be scrumping? must he be scrumping? must we be scrumping? must you be scrumping? must they be scrumping?
Perfect	V-ing perfect
must I have scrumped? must you have scrumped? must he have scrumped? must we have scrumped? must you have scrumped? must they have scrumped?	must I have been scrumping? must you have been scrumping? must he have been scrumping? must we have been scrumping? must you have been scrumping? must they have been scrumping?

Interro-negative form

Simple form	V-ing form
mustn't I scrump? mustn't you scrump? mustn't he scrump? mustn't we scrump? mustn't you scrump? mustn't they scrump?	mustn't I be scrumping? mustn't you be scrumping? mustn't he be scrumping? mustn't we be scrumping? mustn't you be scrumping? mustn't they be scrumping?
Perfect	V-ing perfect
mustn't I have scrumped? mustn't you have scrumped? mustn't he have scrumped? mustn't we have scrumped? mustn't you have scrumped? mustn't they have scrumped?	mustn't I have been scrumping? mustn't you have been scrumping? mustn't he have been scrumping? mustn't we have been scrumping? mustn't you have been scrumping? mustn't they have been scrumping?