English verb conjugation
MUST STUDY

Regular verb: study - studied - studied

Affirmation

Simple form	V-ing form
I must study you must study he must study we must study you must study they must study	I must be studying you must be studying he must be studying we must be studying you must be studying they must be studying
Perfect	V-ing perfect
I must have studied you must have studied he must have studied we must have studied you must have studied they must have studied	I must have been studying you must have been studying he must have been studying we must have been studying you must have been studying they must have been studying

Negation

Simple form	V-ing form
I mustn't study you mustn't study he mustn't study we mustn't study you mustn't study they mustn't study	I mustn't be studying you mustn't be studying he mustn't be studying we mustn't be studying you mustn't be studying they mustn't be studying
Perfect	V-ing perfect
I mustn't have studied you mustn't have studied he mustn't have studied we mustn't have studied you mustn't have studied they mustn't have studied	I mustn't have been studying you mustn't have been studying he mustn't have been studying we mustn't have been studying you mustn't have been studying they mustn't have been studying

Interrogative form

Simple form	V-ing form
must I study? must you study? must he study? must we study? must you study? must they study?	must I be studying? must you be studying? must he be studying? must we be studying? must you be studying? must they be studying?
Perfect	V-ing perfect
must I have studied? must you have studied? must he have studied? must we have studied? must you have studied? must they have studied?	must I have been studying? must you have been studying? must he have been studying? must we have been studying? must you have been studying? must they have been studying?

Interro-negative form

Simple form	V-ing form
mustn't I study? mustn't you study? mustn't he study? mustn't we study? mustn't you study? mustn't they study?	mustn't I be studying? mustn't you be studying? mustn't he be studying? mustn't we be studying? mustn't you be studying? mustn't they be studying?
Perfect	V-ing perfect
mustn't I have studied? mustn't you have studied? mustn't he have studied? mustn't we have studied? mustn't you have studied? mustn't they have studied?	mustn't I have been studying? mustn't you have been studying? mustn't he have been studying? mustn't we have been studying? mustn't you have been studying? mustn't they have been studying?