English verb conjugation
MUST OVERSTUDY

Regular verb: overstudy - overstudied - overstudied

Affirmation

Simple form	V-ing form
I must overstudy you must overstudy he must overstudy we must overstudy you must overstudy they must overstudy	I must be overstudying you must be overstudying he must be overstudying we must be overstudying you must be overstudying they must be overstudying
Perfect	V-ing perfect
I must have overstudied you must have overstudied he must have overstudied we must have overstudied you must have overstudied they must have overstudied	I must have been overstudying you must have been overstudying he must have been overstudying we must have been overstudying you must have been overstudying they must have been overstudying

Negation

Simple form	V-ing form
I mustn't overstudy you mustn't overstudy he mustn't overstudy we mustn't overstudy you mustn't overstudy they mustn't overstudy	I mustn't be overstudying you mustn't be overstudying he mustn't be overstudying we mustn't be overstudying you mustn't be overstudying they mustn't be overstudying
Perfect	V-ing perfect
I mustn't have overstudied you mustn't have overstudied he mustn't have overstudied we mustn't have overstudied you mustn't have overstudied they mustn't have overstudied	I mustn't have been overstudying you mustn't have been overstudying he mustn't have been overstudying we mustn't have been overstudying you mustn't have been overstudying they mustn't have been overstudying

Interrogative form

Simple form	V-ing form
must I overstudy? must you overstudy? must he overstudy? must we overstudy? must you overstudy? must they overstudy?	must I be overstudying? must you be overstudying? must he be overstudying? must we be overstudying? must you be overstudying? must they be overstudying?
Perfect	V-ing perfect
must I have overstudied? must you have overstudied? must he have overstudied? must we have overstudied? must you have overstudied? must they have overstudied?	must I have been overstudying? must you have been overstudying? must he have been overstudying? must we have been overstudying? must you have been overstudying? must they have been overstudying?

Interro-negative form

Simple form	V-ing form
mustn't I overstudy? mustn't you overstudy? mustn't he overstudy? mustn't we overstudy? mustn't you overstudy? mustn't they overstudy?	mustn't I be overstudying? mustn't you be overstudying? mustn't he be overstudying? mustn't we be overstudying? mustn't you be overstudying? mustn't they be overstudying?
Perfect	V-ing perfect
mustn't I have overstudied? mustn't you have overstudied? mustn't he have overstudied? mustn't we have overstudied? mustn't you have overstudied? mustn't they have overstudied?	mustn't I have been overstudying? mustn't you have been overstudying? mustn't he have been overstudying? mustn't we have been overstudying? mustn't you have been overstudying? mustn't they have been overstudying?