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 must not scrump you must not scrump he must not scrump we must not scrump you must not scrump they must not scrump	I must not be scrumping you must not be scrumping he must not be scrumping we must not be scrumping you must not be scrumping they must not be scrumping
Perfect	V-ing perfect
I must not have scrumped you must not have scrumped he must not have scrumped we must not have scrumped you must not have scrumped they must not have scrumped	I must not have been scrumping you must not have been scrumping he must not have been scrumping we must not have been scrumping you must not have been scrumping they must not 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
must I not scrump? must you not scrump? must he not scrump? must we not scrump? must you not scrump? must they not scrump?	must I not be scrumping? must you not be scrumping? must he not be scrumping? must we not be scrumping? must you not be scrumping? must they not be scrumping?
Perfect	V-ing perfect
must I not have scrumped? must you not have scrumped? must he not have scrumped? must we not have scrumped? must you not have scrumped? must they not have scrumped?	must I not have been scrumping? must you not have been scrumping? must he not have been scrumping? must we not have been scrumping? must you not have been scrumping? must they not have been scrumping?