English verb conjugation
MUST CLUMP

Regular verb: clump - clumped - clumped

Affirmation

Simple form	V-ing form
I must clump you must clump he must clump we must clump you must clump they must clump	I must be clumping you must be clumping he must be clumping we must be clumping you must be clumping they must be clumping
Perfect	V-ing perfect
I must have clumped you must have clumped he must have clumped we must have clumped you must have clumped they must have clumped	I must have been clumping you must have been clumping he must have been clumping we must have been clumping you must have been clumping they must have been clumping

Negation

Simple form	V-ing form
I mustn't clump you mustn't clump he mustn't clump we mustn't clump you mustn't clump they mustn't clump	I mustn't be clumping you mustn't be clumping he mustn't be clumping we mustn't be clumping you mustn't be clumping they mustn't be clumping
Perfect	V-ing perfect
I mustn't have clumped you mustn't have clumped he mustn't have clumped we mustn't have clumped you mustn't have clumped they mustn't have clumped	I mustn't have been clumping you mustn't have been clumping he mustn't have been clumping we mustn't have been clumping you mustn't have been clumping they mustn't have been clumping

Interrogative form

Simple form	V-ing form
must I clump? must you clump? must he clump? must we clump? must you clump? must they clump?	must I be clumping? must you be clumping? must he be clumping? must we be clumping? must you be clumping? must they be clumping?
Perfect	V-ing perfect
must I have clumped? must you have clumped? must he have clumped? must we have clumped? must you have clumped? must they have clumped?	must I have been clumping? must you have been clumping? must he have been clumping? must we have been clumping? must you have been clumping? must they have been clumping?

Interro-negative form

Simple form	V-ing form
mustn't I clump? mustn't you clump? mustn't he clump? mustn't we clump? mustn't you clump? mustn't they clump?	mustn't I be clumping? mustn't you be clumping? mustn't he be clumping? mustn't we be clumping? mustn't you be clumping? mustn't they be clumping?
Perfect	V-ing perfect
mustn't I have clumped? mustn't you have clumped? mustn't he have clumped? mustn't we have clumped? mustn't you have clumped? mustn't they have clumped?	mustn't I have been clumping? mustn't you have been clumping? mustn't he have been clumping? mustn't we have been clumping? mustn't you have been clumping? mustn't they have been clumping?