English verb conjugation
MUST CLUMP

Regular verb: clump - clumped - clumped

Affirmation

Simple form	V-ing form
I must clump you must clump she must clump we must clump you must clump they must clump	I must be clumping you must be clumping she 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 she 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 she 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 she 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 she 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 she 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 she 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 she clump? must we clump? must you clump? must they clump?	must I be clumping? must you be clumping? must she 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 she 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 she 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 she 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 she 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 she 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 she have been clumping? mustn't we have been clumping? mustn't you have been clumping? mustn't they have been clumping?