English verb conjugation
MUST PERSIST

Regular verb: persist - persisted - persisted

Affirmation

Simple form	V-ing form
I must persist you must persist he must persist we must persist you must persist they must persist	I must be persisting you must be persisting he must be persisting we must be persisting you must be persisting they must be persisting
Perfect	V-ing perfect
I must have persisted you must have persisted he must have persisted we must have persisted you must have persisted they must have persisted	I must have been persisting you must have been persisting he must have been persisting we must have been persisting you must have been persisting they must have been persisting

Negation

Simple form	V-ing form
I mustn't persist you mustn't persist he mustn't persist we mustn't persist you mustn't persist they mustn't persist	I mustn't be persisting you mustn't be persisting he mustn't be persisting we mustn't be persisting you mustn't be persisting they mustn't be persisting
Perfect	V-ing perfect
I mustn't have persisted you mustn't have persisted he mustn't have persisted we mustn't have persisted you mustn't have persisted they mustn't have persisted	I mustn't have been persisting you mustn't have been persisting he mustn't have been persisting we mustn't have been persisting you mustn't have been persisting they mustn't have been persisting

Interrogative form

Simple form	V-ing form
must I persist? must you persist? must he persist? must we persist? must you persist? must they persist?	must I be persisting? must you be persisting? must he be persisting? must we be persisting? must you be persisting? must they be persisting?
Perfect	V-ing perfect
must I have persisted? must you have persisted? must he have persisted? must we have persisted? must you have persisted? must they have persisted?	must I have been persisting? must you have been persisting? must he have been persisting? must we have been persisting? must you have been persisting? must they have been persisting?

Interro-negative form

Simple form	V-ing form
mustn't I persist? mustn't you persist? mustn't he persist? mustn't we persist? mustn't you persist? mustn't they persist?	mustn't I be persisting? mustn't you be persisting? mustn't he be persisting? mustn't we be persisting? mustn't you be persisting? mustn't they be persisting?
Perfect	V-ing perfect
mustn't I have persisted? mustn't you have persisted? mustn't he have persisted? mustn't we have persisted? mustn't you have persisted? mustn't they have persisted?	mustn't I have been persisting? mustn't you have been persisting? mustn't he have been persisting? mustn't we have been persisting? mustn't you have been persisting? mustn't they have been persisting?