English verb conjugation
MUST LUMP

Regular verb: lump - lumped - lumped

Affirmation

Simple form	V-ing form
I must lump you must lump he must lump we must lump you must lump they must lump	I must be lumping you must be lumping he must be lumping we must be lumping you must be lumping they must be lumping
Perfect	V-ing perfect
I must have lumped you must have lumped he must have lumped we must have lumped you must have lumped they must have lumped	I must have been lumping you must have been lumping he must have been lumping we must have been lumping you must have been lumping they must have been lumping

Negation

Simple form	V-ing form
I must not lump you must not lump he must not lump we must not lump you must not lump they must not lump	I must not be lumping you must not be lumping he must not be lumping we must not be lumping you must not be lumping they must not be lumping
Perfect	V-ing perfect
I must not have lumped you must not have lumped he must not have lumped we must not have lumped you must not have lumped they must not have lumped	I must not have been lumping you must not have been lumping he must not have been lumping we must not have been lumping you must not have been lumping they must not have been lumping

Interrogative form

Simple form	V-ing form
must I lump? must you lump? must he lump? must we lump? must you lump? must they lump?	must I be lumping? must you be lumping? must he be lumping? must we be lumping? must you be lumping? must they be lumping?
Perfect	V-ing perfect
must I have lumped? must you have lumped? must he have lumped? must we have lumped? must you have lumped? must they have lumped?	must I have been lumping? must you have been lumping? must he have been lumping? must we have been lumping? must you have been lumping? must they have been lumping?

Interro-negative form

Simple form	V-ing form
must I not lump? must you not lump? must he not lump? must we not lump? must you not lump? must they not lump?	must I not be lumping? must you not be lumping? must he not be lumping? must we not be lumping? must you not be lumping? must they not be lumping?
Perfect	V-ing perfect
must I not have lumped? must you not have lumped? must he not have lumped? must we not have lumped? must you not have lumped? must they not have lumped?	must I not have been lumping? must you not have been lumping? must he not have been lumping? must we not have been lumping? must you not have been lumping? must they not have been lumping?